WO2006038537A1 - Image recording material-use support and image recording material, and image recording method - Google Patents

Abstract

An image recording material-use support capable of recording a high-quality image free from blistering, uneven recording and uneven fixing, and an image recording material and an image recording method using the image recording material-use support. The image recording material-use support comprises base paper and at least one each polyolefin resin layer formed on the opposite sides of the base paper, characterized in that at least two front-surface polyolefin resin layers are disposed on the side of the polyolefin resin layer where an image recording layer is provided, and an average density of the outer-most front-surface polyolefin resin layer remotest from the base paper is smaller than an average density of at least any one of front-surface polyolefin resin layers except for the outer-most front-surface polyolefin resin layer.

Description

 Specification

 Technical field of image recording material support, image recording material, and image recording method

 The present invention relates to an image recording material support capable of recording a high-quality image without occurrence of blistering and occurrence of recording unevenness and fixing unevenness, and an image recording material using the image recording material support, The present invention also relates to an image recording method.

 Background art

 Conventionally, as a support for various image recording materials such as electrophotographic materials, heat sensitive materials, ink jet recording materials, sublimation transfer materials, thermal image materials, silver salt photographic materials, thermal transfer materials, for example, base paper, Synthetic paper, synthetic resin sheet, coated paper, laminated paper and the like are used, and among these, coated paper and laminated paper are suitable.

 As such a support for image recording material, for example, a support provided with at least one resin coating layer on both sides of a base paper has been proposed (see Patent Documents 1 to 3).

 However, if these image recording material supports are used in electrophotographic materials, heat-sensitive materials, and various thermal transfer recording materials, any process in image recording has a high-temperature heating process, so it is generated from the base paper. There is a problem that bubbles such as water vapor cause blisters in the resin coating layer. Further, when a heat-resistant high-coating material is used for the resin coating layer of the image recording material support, there is a problem that recording unevenness or fixing unevenness due to poor followability occurs.

 [0003] Accordingly, a support for an image recording material having at least one polyolefin resin layer on both sides of a base paper and capable of recording a high-quality image without occurrence of blistering and non-uniformity of fixing is provided. It has not been obtained yet, and the current situation is that it is desired to provide it.

[0004] Patent Document 1: Japanese Patent Laid-Open No. 7-120868

 Patent Document 2: JP-A-9 146218

 Patent Document 3: Japanese Patent Laid-Open No. 2000-10327

Disclosure of the invention The present invention relates to an image recording material support capable of recording a high-quality image without occurrence of blistering and occurrence of recording unevenness and fixing unevenness, and various image recording materials using the image recording material support. An object of the present invention is to provide an image recording method.

 [0006] Means for solving the above-described problems are as follows. That is,

 <1> The base paper and at least one polyolefin resin layer on both sides of the base paper, and the front surface polyolefin resin layer on the side on which the image recording layer is provided in the polyolefin resin layer has 2 The average density force of the outermost front surface polyolefin resin layer located at the farthest position and more than the base paper force The front surface other than the outermost front surface polyolefin resin layer The polyolefin surface resin layer An image recording material support characterized in that it is smaller than the average density of at least one of the above.

 <2> The support for an image recording material according to <1>, which is used for image recording in which at least one of recording by heating, development by heating, and fixing by heating is performed.

<3> The average density of the outermost surface polyolefin resin layer is less than 0.930 gZcm ³ and at least the outer surface polyolefin resin layer other than the outermost surface polyolefin resin layer is at least The image recording material support according to any one of <1> to <2>, wherein any one of the average densities is 0.930 gZcm ³ or more.

 <4> The material according to any one of <1> to <3>, wherein the thickness of at least one of the front surface polyolefin resin layers other than the outermost surface polyolefin resin layer is 15 μm or more. A support for an image recording material.

<5> The outermost surface polyolefin resin layer contains a low density polyethylene having a density of 0.930 gZcm ³ or less, and the outer surface polyolefin resin layer other than the outermost surface polyolefin resin layer. The support for an image recording material according to any one of <1> to <4>, wherein at least one of the oil layers contains a high-density polyethylene resin having a density of 0.945 gZcm ³ or more.

<6> The content of the high density polyethylene resin having a density of 0.945 gZcm ³ or more in at least one of the surface polyolefin resins other than the outermost polyolefin resin layer is 30% by mass or more. The support for image recording material according to <5> above. <7> At least one of the polyolefin resin layers is an organic pigment or an inorganic pigment.

The support for an image recording material according to any one of <1> to <6>, containing V or any deviation.

 <8> An image recording material comprising the image recording material support according to any one of <1> to <7>, and at least an image recording layer on the support.

 <9> The image recording material according to <8>, wherein at least one of recording by heating, development by heating, and fixing by heating is performed.

 <10> Electrophotographic material, heat sensitive material, sublimation transfer material, thermal transfer material, heat developing material, silver salt photographic material and inkjet recording material The image recording material described in any one of the above.

 <11> The thermal recording material having at least the thermal recording layer on the image recording material support according to any one of <1> to <7> is heated by using either a thermal head or a laser. An image recording method comprising: an image recording step for recording the image.

 <12> A latent image recording step of recording a latent image by baking exposure of a heat-developable material having at least an image recording layer on the image recording material support according to any one of <1> to <7>,

 A heat developing process for forming a visible image by heating using a misalignment of a heat roller, a heat belt, a plate heater, a thermal head, a laser, and a combination of the heat developed material exposed to printing This is an image recording method.

 <13> Toner image forming step of forming a toner image on an electrophotographic material having at least a toner image-receiving layer on the image recording material support according to any one of <1> and <7>

 And a heat fixing step of fixing the toner image by heating using any one of a fixing roller, a fixing belt, and a combination thereof.

<14> On the image recording material support according to any one of <1> to <7>. A toner image forming step of forming a toner image on an electrophotographic material having at least a toner image receiving layer;

 And an image surface smoothness fixing step for smoothening the surface of the formed toner image.

 <15> In the image surface smoothing and fixing step, the toner image is heated and pressed using an image surface smoothing and fixing processing machine having a heating and pressing member, a belt member, and a cooling device, and then cooled and peeled off. <14> The image recording method according to <14>.

 <16> The image recording method according to <15>, wherein the surface of the belt member has a layer containing a fluorocarbonsiloxane rubber.

 <17> The image recording method according to <15>, wherein the belt member has a layer containing silicone rubber on the surface, and the silicon rubber-containing layer has a layer containing fluorocarbonsiloxane rubber. is there.

 <18> Fluorocarbonsiloxane rubber strength The image according to any one of <16> to <17>, wherein the main chain has at least one of a perfluoroalkyl ether group and a perfluoroalkyl group. It is a recording method.

[0007] The support for an image recording material of the present invention comprises a base paper and at least one polyolefin resin layer on both surfaces of the base paper, and an image recording layer in the polyolefin resin layer is provided. The average density force of the outermost front surface polyolefin resin layer located at the farthest position of the base paper strength is two or more on the side of the front surface polyolefin resin layer and the outermost front surface polyolefin resin layer. Since it is smaller than the average density of at least one of the front surface polyolefin resin layers other than the oil layer, it is possible to record a high-quality image without occurrence of recording unevenness or fixing unevenness without blistering.

[0008] The image recording material of the present invention has the image recording material support of the present invention, so that a high-quality image without occurrence of recording unevenness and fixing unevenness without occurrence of blisters. An image can be recorded, and in particular, an image recording material suitable for any of electrophotographic materials, heat-sensitive materials, sublimation transfer materials, thermal transfer materials, heat development materials, silver salt photographic materials, and inkjet recording materials can be provided.

[0009] In the first aspect, the image recording method of the present invention is the image recording material support of the present invention. It comprises an image recording step for recording an image by heating a thermal recording material having at least a thermal recording layer thereon using a thermal head and a laser V or a deviation. This one

In addition, it is possible to record high-quality images with no recording unevenness or fixing unevenness without blistering.

 [0010] In the second embodiment, the image recording method of the present invention is a latent image recording step of recording a latent image by printing exposure of a heat-developable material having at least an image recording layer on the image recording material support of the present invention. And a heat development step of forming a visible image by heating the heat-developable material subjected to printing exposure using a heating roller, a heating belt, a plate heater, a thermal head, a laser, or a combination thereof. Become. As a result, it is possible to record a high-quality image without occurrence of blistering uneven recording and fixing unevenness.

 [0011] The image recording method of the present invention, in a third form, includes a toner image forming step of forming a toner image on an electrophotographic material having at least a toner image receiving layer on the image recording material support of the present invention; And a heat fixing step of fixing the toner image by heating using any one of a fixing roller, a fixing belt, and a combination thereof. As a result, it is possible to record a high-quality image without occurrence of blistering and without occurrence of uneven recording or uneven fixing.

 In the fourth embodiment, the image recording method of the present invention is a toner image forming step of forming a toner image on an electrophotographic material having at least a toner image receiving layer on the image recording material support of the present invention; And an image surface smoothness fixing step for smoothening the surface of the toner image. As a result, it is possible to record a high-quality image without occurrence of recording unevenness and fixing unevenness without occurrence of blisters.

 Brief Description of Drawings

 FIG. 1 is a schematic view showing an example of an image surface smoothing and fixing processor according to the present invention.

 FIG. 2 is a schematic view showing an example of an image forming apparatus of the present invention.

 FIG. 3 is a schematic view showing an example of an image surface smoothness / fixing processor in FIG. 2. BEST MODE FOR CARRYING OUT THE INVENTION

[0014] (Support for Image Recording Material)

The support for image recording material of the present invention comprises a base paper and at least one polyolefin resin layer on both sides of the base paper, and an image recording layer in the polyolefin resin layer is provided. There are two or more front polyolefin resin layers on the side, and other layers as necessary.

 In this case, the image recording material support is preferably used for image recording in which at least one of recording by heating, development by heating, and fixing by heating is performed.

[0015] <Base paper>

 The base paper is not particularly limited, and can be appropriately selected according to the purpose. Specifically, it is a high-quality paper, for example, “Photographic Engineering Fundamental Silver Salt Photo Edition” edited by the Japan Photographic Society. Papers described on pages 223 to 224 of Corona Publishing Co. (Showa 54) are preferred.

 [0016] In order to impart a desired centerline average roughness to the surface of the base paper, a fiber length distribution (for example, a 24 mesh screen as described in JP-A-58-68037, for example). For example, it is preferable to use pulp fibers having a total force of 20% to 45% by mass and a remaining value of 5% or less by 24 mesh screen. In addition, the center line average roughness can be adjusted by surface treatment with heat and pressure by machine calender and super calender.

 [0017] The base paper is not particularly limited as long as it is a known material used for a support, and various material strengths can be appropriately selected according to the purpose. For example, natural paper such as conifers and hardwoods can be selected. Examples thereof include pulp, a mixture of the natural pulp and synthetic pulp.

 [0018] As a norp that can be used as a raw material of the base paper, the surface smoothness, rigidity and dimensional stability (curlability) of the base paper are simultaneously improved to a sufficient level with a good balance. LBKP) is desirable, but softwood bleached kraft pulp (NBKP), hardwood sulfite pulp (LBSP), etc. can also be used.

 A beater, refiner, etc. can be used to beat the above-mentioned norp.

Norp's Canadian standard freeness is more preferably 200 to 440 ml C. SF force ^, more preferably 250 to 380 ml C. SF force ^ /, because paper shrinkage can be controlled during the paper making process. In the pulp slurry obtained after beating the pulp (hereinafter sometimes referred to as “pulp stock”), various additives such as a filler, a dry paper strength enhancer, Sizing agents, wet paper strength enhancers, fixing agents, pH adjusters, pitch control agents, slime control agents, and other agents are added.

 Examples of the filler include, for example, calcium carbonate, clay, kaolin, white clay, talc, titanium dioxide, diatomaceous earth, barium sulfate, aluminum hydroxide, magnesium hydroxide, calcined sauce, calcined kaolin, deramikaolin, heavy Calcium carbonate, light calcium carbonate, magnesium carbonate, barium carbonate, zinc oxide, silicon oxide, amorphous silica, aluminum hydroxide, calcium hydroxide, zinc hydroxide, urea-formalin resin, polystyrene resin Examples thereof include fat, phenol resin, and fine hollow particles.

 Examples of the dry paper strength enhancer include cationized starch, cationized polyacrylamide, ionic polyacrylamide, amphoteric polyacrylamide, and carboxy-modified polybutyl alcohol.

 Examples of the sizing agent include higher fatty acid salts; styrene acrylic compounds, petroleum rosin sizing agents; rosin derivatives such as rosin and malein rosin, paraffin wax, alkyl ketene dimer, alkale succinic anhydride (ASA). ) And compounds containing higher fatty acids such as epoxy fatty acid amides.

 Examples of the wet paper strength enhancer include polyamine polyamide epoxy hydrin, melamine resin, urea resin, epoxy polyamide resin, and the like.

 Examples of the fixing agent include polyvalent metal salts such as aluminum sulfate and aluminum chloride; basic aluminum compounds such as sodium aluminate, basic aluminum chloride, and basic polyhydroxyaluminum aluminum; ferrous sulfate, Polyvalent metal compounds such as ferric sulfate; starch, processed starch, polyacrylamide, urea resin, melamine resin, epoxy resin, polyamide resin, polyamine resin, polyethyleneimine, plant gum, polyethylene oxide, etc. Water-soluble high molecules; cationic polymers such as cationized starch; hydrophilic cross-linked polymer particle dispersions, various compounds such as derivatives or modified products thereof, and the like.

 Examples of the pH adjuster include caustic soda and sodium carbonate. Examples of the other chemicals include antifoaming agents, dyes, slime control agents, fluorescent whitening agents, and the like.

Furthermore, a softening agent etc. can also be added as needed. As the softening agent, For example, it is possible to use those described in the new 'paper processing Handbook (paper medicine Time Inc. eds) 5 ^{54-5 55} pp (19Derutaomikuron year published) and the like.

 These various additives may be used alone or in combination of two or more. Further, the amount of these various additives added to the pulp paper stock can be appropriately selected according to the purpose without particular limitation, and is preferably 0.1 to 1.0% by mass.

[0020] To the pulp slurry, pulp paper containing the various additives, if necessary, is further added to a hand paper machine, a long paper machine, a round paper machine, a twin wire machine, or a combination machine. Paper is made using a paper machine such as, and then dried to produce a base paper. Further, if desired, surface sizing treatment can be performed either before or after the drying. The treatment liquid used for the surface sizing treatment is not particularly limited, and can be appropriately selected according to the purpose. For example, a water-soluble polymer compound, a water-resistant substance, a pigment, a dye, a fluorescent brightening agent, etc. It may be included.

 Examples of the water-soluble polymer compound include cationized starch, oxidized starch, polybutyl alcohol, carboxy-modified polybutyl alcohol, carboxymethyl cellulose, hydroxyethylenosenorerose, senorelose sanoleate, gelatin, Casein, sodium polyacrylate, styrene maleic anhydride copolymer sodium salt, sodium polystyrene sulfonate, and the like.

 [0021] Examples of the water-resistant substance include latex emulsions such as styrene butadiene copolymer, ethylene acetate butyl copolymer, polyethylene, and salt vinylidene copolymer, and polyamide polyamine epoxy hydrin. And synthetic waxes.

 Examples of the pigment include calcium carbonate, clay, kaolin, talc, barium sulfate, and titanium oxide.

 [0022] The ratio of the longitudinal Young's modulus (Ea) to the transverse Young's modulus (Eb) (EaZEb) of the base paper is 1.5-2 in terms of improving rigidity and dimensional stability (curling property). Preferably it is in the 0 range. When the EaZEb value is less than 1.5 or more than 2.0, the rigidity of the image recording material and the curling property are liable to deteriorate and the running property during conveyance is likely to be hindered.

[0023] In general, paper “strains” have been determined to differ based on different beating styles, After beating, the elastic force (rate) of the paper made by papermaking can be used as an important factor representing the degree of paper “strain”. In particular, by utilizing the relationship between the dynamic elastic modulus, which indicates the physical properties of the viscoelastic material of paper, and the density, and using this ultrasonic vibration element to measure the speed of sound propagating through the paper, the elasticity of the paper The rate can be obtained from the following equation.

 E = p c 1 n)

 However, in the above formula, E means dynamic elastic modulus. p means density. c means the speed of sound in the paper. n means Poisson's ratio.

[0024] Further, in the case of normal paper, since n = 0.2, it can be calculated with a large difference even if it is calculated by the following formula.

 2

 E = p c

 That is, if the paper density and sound velocity can be measured, the elastic modulus can be easily obtained. In the above equation, when measuring the speed of sound, various known devices such as a sock tester SST-110 (manufactured by Nomura Corporation) can be used.

[0025] The thickness of the base paper is not particularly limited, and can be appropriately selected according to the purpose. Usually, it is 30 to 500 111 girls, 50 to 300 111 girls, 100 to 250. m force S is more preferable. The basis weight of the base paper is not particularly limited and can be appropriately selected according to the purpose. For example, 50 to 250 gZm ² force is preferable, and 100 to 200 gZm ² force is more preferable.

[0026] Preferably, the base paper is calendered. The calendar processing is preferably performed such that the metal roll is in contact with the image recording surface side of the base paper. The surface temperature of the metal roll is preferably 100 ° C or higher, more preferably 150 ° C or higher, and further preferably 200 ° C or higher. The upper limit temperature of the surface temperature of the metal roll is a force that can be appropriately selected according to the purpose for which there is no particular limitation. For example, about 300 ° C. is preferable. As the nip pressure during calendering is not particularly limited and may be appropriately selected depending on the Nag purposes, LOOkNZcm ² or more preferably tool 100～600KNZcm ² Gayori preferred.

[0027] The calendar in the calendar process is not particularly limited and can be appropriately selected depending on the purpose. For example, a soft calender roll comprising a combination of a metal roll and a synthetic resin roll, a pair of metal rolls Has a machine calendar roll consisting of And the like. Among these, those having a soft calender roll are suitable, and in particular, a metal roll and a long two-ply chew calender with a synthetic resin belt can take a long-pipe width. It is preferable because the contact area between the cast coat layer of the base paper and the tool increases.

 [0028] <Polyolefin resin layer>

 The polyolefin resin layer is provided at least one layer on both sides of the base paper, and at least two front surface polyolefin resin layers are provided on the image recording layer side of the base paper, and are located farthest from the base paper. The outermost front surface polyolefin resin layer and the outermost surface polyolefin resin layer other than the outermost surface polyolefin resin layer.

 [0029] In this case, when the front surface polyolefin resin layer is formed by laminating two layers of the lower polyolefin resin layer and the upper polyolefin resin layer in this order on the base paper, the upper polyolefin resin layer The outermost surface polyolefin resin layer becomes the outermost surface polyolefin resin layer, and the lower polyolefin resin layer becomes the front surface polyolefin resin layer other than the outermost surface polyolefin resin layer.

 If the lower polyolefin resin layer, the intermediate polyolefin resin layer, and the upper polyolefin resin layer are laminated on the base paper in this order, the upper polyolefin resin layer The resin layer is the outermost surface polyolefin resin layer, and the lower polyolefin resin layer and the intermediate polyolefin resin layer are surface polyolefin resins other than the outermost surface polyolefin fin resin layer. Become a layer.

[0030] In the present invention, the average density of the outermost front surface polyolefin resin layer located farthest from the base paper is at a position other than that of the outermost front surface polyolefin resin layer. It is characterized by being smaller than the average density of at least one of the front surface polyolefin resin layers. As a result, it is possible to record a high-quality image without occurrence of recording unevenness or fixing unevenness that causes no prestar due to heating during image recording, development, or fixing.

The average density of the outermost front surface polyolefin榭脂layer preferably is less than 0. 930gZcm ³ instrument 0. 925gZcm ³ or less is more preferable.

The average density of at least one of the front surface polyolefin resin layers other than the outermost surface polyolefin resin layer is preferably 0.930 gZcm ³ or more. 0.950 g / cm ³ The above is more preferable, and the upper limit of the average density is 0.970 gZcm ³ .

[0031] The thickness of at least one of the front surface polyolefin resin layers other than the outermost front surface polyolefin resin layer is preferably 15 m or more, more preferably 15 to 20 m. If the thickness is less than 15 m, the limit temperature that can withstand blisters decreases, and blisters may be generated at lower temperatures.

 Further, the thickness of the outermost surface polyolefin resin layer is preferably 10 to 30 μm, more preferably 5 m or more. If the thickness of the outermost surface polyolefin resin layer is less than 5 μm, recording irregularities and fixing irregularities may occur due to poor followability, and if it exceeds 30 / zm, the polyolefin resin Productivity may decrease due to restrictions on the melt discharge rate.

 The thickness of the back surface polyolefin resin layer is not particularly limited and can be appropriately selected according to the purpose. However, from the viewpoint of curl balance, the thickness of the final form is appropriately set so that the curl is flat. U, prefer to adjust.

Examples of the polyolefin resin in the polyolefin resin layer include, for example, polyethylene resin, polypropylene resin, blend of polypropylene resin and polyethylene resin, high density polyethylene resin, high density polyethylene resin and low A blend with a density polyethylene resin is preferred.

The outermost surface polyolefin resin layer contains a low density polyethylene resin having a density of 0.930 gZcm ³ or less (preferably 0.925 gZcm ³ or less), and the outermost surface polyolefin resin resin. at least one density 0. 945gZcm ³ or more tables face polyolefin榭脂layer other than the layer (preferably 0. 950gZcm ³ or higher) preferably contains a high density polyethylene榭脂of.

The content of the high-density polyethylene resin having a density of 0.945 gZcm ³ or more in at least one of the front surface polyolefin resin layers other than the outermost surface polyolefin resin layer is 30% by mass or more. 50% by mass or more is more preferable.

[0033] It is preferable that at least one of the polyolefin resin layers (either the front surface or the back surface) contains at least one of an organic pigment and an inorganic pigment.

Examples of the organic pigment include ultramarine blue, selenmble one, phthalocyanine blue, Baltic violet, fast violet, manganese violet, and the like. Examples of the inorganic pigment include titanium dioxide, calcium carbonate, talc, stearic acid amide, and zinc stearate.

 Among these, titanium dioxide is preferable. The content of titanium titanate nitric acid in the polyolefin resin layer, which may be either anatase type or rutile type, is preferably 5 to 30% by mass.

[0034] The method for forming the polyolefin resin layer is not particularly limited, and can be appropriately selected depending on the purpose, and is usually a lamination method, a sequential lamination method, a foot block type, a multi-hold type. It is formed by coating by any one of a multi-slot type single layer or multilayer extrusion die, a laminating method using a laminator, or a coextrusion coating method in which multiple layers are extrusion coated simultaneously. The shape of the single-layer or multi-layer extrusion die can be appropriately selected according to the purpose without any particular limitation, and examples thereof include a T die and a coat nonga die.

The support for an image recording material of the present invention obtained as described above can record a high-quality image without occurrence of blistering and non-uniformity of fixing, and can be used for various applications. For example, it can be suitably used for electrophotographic materials, heat-sensitive materials, sublimation transfer materials, thermal transfer materials, heat development materials, silver salt photographic materials, ink jet recording materials, and the like.

[0036] (Image recording material)

 The image recording material of the present invention comprises the support for image recording material of the present invention and at least an image recording layer on the support, and further comprises other layers as necessary. Here, the support for the image recording material is as described above. The image recording material is preferably subjected to at least one of recording by heating, development by heating, and fixing by heating! /.

 The recording by heating is preferably performed by the deviation of the thermal head and the laser.

It is preferable that the development by heating is performed by a deviation of a heating roller, a heating belt, a plate heater, a thermal head, a laser, and a combination thereof! /. The fixing by heating is preferably performed by any one of a fixing roller, a fixing belt, and a combination thereof.

 [0037] The image recording material varies depending on the use and type of the image recording material. For example, an electrophotographic material, a heat-sensitive material, a sublimation transfer material, a thermal transfer material, a heat development material, a silver salt photographic material, and an inkjet recording. Materials, etc. Hereinafter, each image recording material will be described focusing on the electrophotographic material.

 [0038] <Electrophotographic materials>

 The electrophotographic material has the support for image recording material of the present invention and a toner image receiving layer on at least one surface of the support as an image recording layer, and other layers appropriately selected as necessary, for example, , Surface protective layer, back layer, intermediate layer, undercoat layer, cushion layer, charge control (prevention) layer, reflection layer, color adjustment layer, storage stability improvement layer, anti-adhesion layer, anti-curl layer, smooth layer Etc. Each of these layers may have a single layer structure or a laminated structure.

 [0039] [Toner image-receiving layer]

 The toner image receiving layer is a layer for receiving color toner and black toner and forming an image. The toner image-receiving layer has a function of receiving toner that forms an image from a developing drum or an intermediate transfer body by (static) electricity, pressure, etc. in a transfer process, and fixing it by heat, pressure, etc. in a fixing process Have

 [0040] The toner image-receiving layer is preferably a low-transparency toner image-receiving layer having a light transmittance of 78% or less from the viewpoint that the electrophotographic material of the present invention has a photographic feel. 73% or less is more preferable, and 72% or less is more preferable.

 The light transmittance should be measured using a direct reading haze meter (Suga Test Instruments H GM 2DP) separately formed on a polyethylene terephthalate film (100 m) with the same thickness. Can do.

 [0041] The toner image-receiving layer contains at least a thermoplastic resin, and further various additives added for the purpose of improving the thermodynamic properties of the toner image-receiving layer, for example, a release agent, a plasticizer. Contains a colorant, a colorant, a filler, a crosslinking agent, a charge control agent, an emulsifier, a dispersant and the like.

[0042] Thermoplastic resin The thermoplastic resin is not particularly limited and can be appropriately selected according to the purpose. (1) Polyolefin resin, (2) Polystyrene resin, (3) Acrylic resin, (4 ) Polyvinyl acetate or its derivatives, (5) Polyamide resin, (6) Polyester resin, (7) Polycarbonate resin, (8) Polyether resin (or Acetal resin), (9) Others And the like. These may be used alone or in combination of two or more. Among these, styrene resin, acrylic resin, and polyester resin having a large cohesive energy are particularly preferably used from the viewpoint of embedding toner.

 Examples of the polyolefin resin of (1) include polyolefin resins such as polyethylene and polypropylene, and copolymer resins of olefins such as ethylene and propylene and other bur monomers. Examples of the copolymer resin of the olefin and other bulle monomers include, for example, an ethylene acetate butyl copolymer, an ionomer resin that is a copolymer of acrylic acid and methacrylic acid, and the like. Examples of the polyolefin resin derivative include chlorinated polyethylene and chlorosulfone-polyethylene. Examples of the polystyrene-based resin (2) include polystyrene resin, styrene-isobutylene copolymer, acrylonitrile-styrene copolymer (AS resin), acrylonitrile-butadiene-styrene copolymer (ABS resin), polystyrene. Maleic anhydride and the like.

 Examples of the acrylic resin of (3) include polyacrylic acid or esters thereof, polymethacrylic acid or esters thereof, polyacrylonitrile, polyacrylamide and the like.

Examples of the polyacrylic acid esters include homopolymers and multi-component copolymers of acrylic acid esters. Examples of the ester of acrylic acid include methyl acrylate, ethyl acrylate, n-butyl acrylate, isobutyl acrylate, dodecyl acrylate, n-octyl acrylate, 2-ethylhexyl acrylate, and acrylic acid. Examples of the methacrylic acid esters include homopolymers and multi-component copolymers of the methacrylic acid esters. As the ester of methacrylic acid, For example, methyl methacrylate, ethyl methacrylate, butyl methacrylate, etc. Examples of the polyacetate bule or derivative thereof of (4) above include, for example, polybute obtained by saponifying polyvinyl acetate and polyacetate bule. Examples thereof include polyvinyl acetal resin obtained by reacting alcohol or polybutyl alcohol with an aldehyde (for example, formaldehyde, acetoaldehyde, butyraldehyde, etc.).

 The polyamide-based resin (5) is a polycondensate of diamine and dibasic acid, and examples thereof include 6-nylon and 6,6-nylon.

The polyester resin of the above (6) is produced by condensation polymerization of an acid component and an alcohol component. The acid component is not particularly limited and can be appropriately selected according to the purpose. For example, maleic acid, fumaric acid, citraconic acid, itaconic acid, glutaconic acid, phthalic acid, terephthalic acid, isophthalic acid, succinic acid , Adipic acid, sebacic acid, azelaic acid, malonic acid, n-dodecenyl succinic acid, isododecenyl succinic acid, n-dodecyl succinic acid, isododecyl succinic acid, _n otatur succinic acid, n-octyl succinic acid, iso otatur succinic acid, iso Examples include octyl succinic acid, trimellitic acid, pyromellitic acid, acid anhydrides thereof, or lower alkyl esters thereof.

The alcohol component is not particularly limited and may be appropriately selected depending on the purpose. For example, a divalent alcohol is preferable. Examples of the aliphatic diol include ethylene glycol, diethylene glycol, triethylene glycol, 1,2-propylene glycol, 1,3 propylene glycol, 1,4 butanediol, neopentyl glycol, 1,4-butenediol, 1, 5 Examples include pentanediol, 1,6 hexanediol, 1,4-cyclohexanedimethanol, dipropylene glycol, polyethylene glycol, polypropylene glycol, and polytetremethylene glycol. Examples of bisphenol A alkylene oxide products include polyoxypropylene (2.2) 2,2 bis (4 hydroxyphenol) propane, polyoxypropylene (3.3) -2. , 2 Bis (4 hydroxyphenol) propane, polyoxyethylene (2.0) -2,2 Bis (4hydroxyphenyl) propane, polyoxypropylene (2.0) —Polyoxyethylene (2. 0) — 2,2 Bis (4 hydroxyphenol) propane, polyoxypropylene (6) —2,2 Bis (4-hydroxyphenol) propane and the like can be mentioned.

 As the polycarbonate resin (7), bisphenol A and a polycarbonate obtained by phosgene are generally used.

 Examples of the polyether resin (or acetal resin) in (8) include polyether resins such as polyethylene oxide and polypropylene oxide, and acetal resins such as polyoxymethylene as the ring-opening polymerization system.

 Examples of the other (9) resin include polyaddition polyurethane resin.

[0044] The thermoplastic resin preferably satisfies the toner image-receiving layer properties described later in the state where the toner image-receiving layer is formed. Even if the resin alone is preferable, the toner image-receiving layer properties described later can be satisfied. It is also preferable to use two or more types of resins having different physical properties of the toner image-receiving layer, which will be described later.

[0045] The thermoplastic resin preferably has a larger molecular weight than the thermoplastic resin used in the toner. However, the molecular weight is preferably the above-described molecular weight relationship because of the relationship between the thermodynamic properties of the thermoplastic resin used in the toner and the thermoplastic resin in the toner image-receiving layer. Not necessarily. For example, when the softening temperature of the thermoplastic resin in the toner image-receiving layer is higher than the thermoplastic resin used in the toner, the molecular weight is the same or the thermoplastic resin in the toner-image-receiving layer. It may be preferable to be smaller.

[0046] As the thermoplastic resin of the toner image-receiving layer, it is also preferable to use a mixture of resins having the same composition and different average molecular weights. The relationship disclosed in JP-A-8-334915 is preferred as the relationship with the molecular weight of the thermoplastic resin used in the toner.

 The molecular weight distribution of the thermoplastic resin in the toner image-receiving layer is preferably wider than the molecular weight distribution of the thermoplastic resin used in the toner.

As the thermoplastic resin for the toner image-receiving layer, JP-A-5-127413, JP-A-8 194394, JP-A-8-334915, JP-A-8-334916, JP-A-9-171265. Those satisfying the physical properties disclosed in JP-A-10-221877 and the like are preferable. [0047] The thermoplastic resin for the toner image-receiving layer is excellent in environmental suitability and work suitability in which (i) organic solvent is not discharged in the coating and drying step. (Ii) Many release agents such as waxes are difficult to dissolve in a solvent at room temperature and are often dispersed in a solvent (water, organic solvent) in advance. In addition, the water dispersion form is more stable and more suitable for the manufacturing process. Furthermore, it is easier to obtain the effect of a release agent (offset resistance, adhesion resistance, etc.) in the case of aqueous coating, because the wax is easily bleached on the surface during the coating and drying process. For this reason, water-based resin such as water-dispersible polymer and water-soluble polymer is preferably used.

 [0048] The water-based resin is not particularly limited in terms of its composition, bond structure, molecular structure, molecular weight, molecular weight distribution, morphology, etc., as long as it is either a water-dispersible polymer or a water-soluble polymer. However, the water-based group of the polymer includes, for example, a sulfonic acid group, a hydroxyl group, a carboxylic acid group, an amino group, an amide group, an ether group, and the like.

 [0049] Examples of the water-dispersible polymer include, among the above-mentioned resins, (1) to (9), which are water-dispersed thermoplastic resins, emulsions, copolymers thereof, mixtures, and cation-modified products. It can be selected as appropriate, and two or more can be combined.

 As the water-dispersible polymer, a suitably synthesized polymer may be used, or a commercially available product may be used. Examples of the commercially available products include polyester-based water-dispersible polymers such as Toyobo Co., Ltd.'s Bironal series, Takamatsu Yushi Co., Ltd. Pesresin A series, Kao Corporation's Tufton UE series, Nippon Gosei Co., Ltd. For example, Polyester WR series manufactured by Chemical Industry Co., Ltd.

. Examples of acrylic water-dispersible polymers include Hiros XE, KE, PE series manufactured by Seiko Chemical Industry Co., Ltd. and Jurimer ET series manufactured by Nippon Pure Chemical Co., Ltd.

[0050] The water-dispersible emulsion is not particularly limited and may be appropriately selected depending on the purpose. For example, the water-dispersible polyurethane emulsion, the water-dispersible polyester emulsifier.

, Butylpyridine styrene butadiene emulsion, polybutene emulsion, polyethylene emulsion, vinyl acetate emulsion, ethylene Examples include a mardijon, a vinylidene chloride emulsion, and a methyl methacrylate-butadiene emulsion. Among these, water dispersible polyester emulsion is particularly preferable.

 The water-dispersible polyester emulsion is preferably a self-dispersing water-based polyester emulsion. Among these, a carboxyl group-containing self-dispersing water-based polyester emulsion is particularly preferable. Here, the self-dispersing aqueous polyester emulsion means an aqueous emulsion containing a polyester resin that can be self-dispersed in an aqueous solvent without using an emulsifier or the like. The carboxyl group-containing self-dispersing aqueous polyester resin emulsion means an aqueous emulsion containing a polyester resin that contains a carboxyl group as a hydrophilic group and can be self-dispersed in an aqueous solvent.

 [0051] The self-dispersing water-dispersible polyester emulsion preferably satisfies the following characteristics (1) to (4). This is a self-dispersing type that does not use a surfactant, so it suppresses the occurrence of offset during fixing and sheet-to-sheet adhesion failure during storage, with a low decrease in softness point due to moisture with low hygroscopicity even in a high humidity atmosphere. it can. In addition, because it is water-based, it has excellent environmental performance and workability. In addition, polyester resin that has a high cohesive energy molecular structure is used, so it has sufficient hardness in the storage environment, but in the fixing process of electrophotography, it becomes a low elastic (low viscosity) molten state, Toner can be embedded in the image receiving layer to achieve sufficient image quality.

 (1) Number average molecular weight (Mn) is preferably 5,000 to 10,000 force, more preferably 5,000 to 7,000 force.

 (2) The molecular weight distribution (weight average molecular weight Z number average molecular weight) is preferably 4 or less, more preferably Mw / M n≤3.

 (3) The glass transition temperature (Tg) is preferably 40 to 100 ° C, more preferably 50 to 80 ° C.

(4) The volume average particle size is preferably 20 to 200 nm, more preferably 40 to 150 nm. The content of the water-dispersible emulsion in the toner image-receiving layer is 10 to 90 mass

10 to 70% by mass is more preferable.

[0052] The water-soluble polymer is special if the weight average molecular weight (Mw) is 400,000 or less. There are no restrictions, and it can be appropriately selected according to the purpose, and an appropriately synthesized product may be used, or a commercially available product may be used. For example, polyvinyl alcohol, carboxy-modified polyvinylinoreconole, Examples thereof include carboxymethyl cellulose, hydroxyethyl cellulose, cellulose sulfate, polyethylene oxide, gelatin, cationized starch, casein, sodium polyacrylate, styrene-maleic anhydride copolymer sodium, and sodium polystyrene sulfonate. Of these, polyethylene oxide is preferred.

 Commercially available products of the water-soluble polymer include water-soluble polyesters as various plus coats manufactured by Kairai Chemical Industry Co., Ltd., Finetex ES series manufactured by Dainippon Ink and Chemicals, and Nippon Pure Chemical Co., Ltd. as water-soluble acrylics. Jurimer AT series manufactured by Dainippon Ink & Chemicals, Inc. Finetex 6161, K-96; HIROS NL-1189, BH-997L manufactured by Seiko Chemical Industry Co., Ltd.

 Examples of the water-soluble polymer include Research 'Disclosure 17, 643, page 26, Research' Disclosure 18, 716, page 651, Research 'Disclosure 307, 105, pages 873-874, and JP — The power S described in the 13546 gazette.

[0053] The content of the water-soluble polymer in the toner image-receiving layer can be appropriately selected according to the purpose without particular limitation, and is preferably 0.5 to ² gZm2.

 [0054] The thermoplastic resin can be used in combination with other polymer materials, but in that case, the thermoplastic resin is generally used in such a manner that its content is larger than that of other polymer materials.

 The content of the thermoplastic resin for the toner image-receiving layer in the toner image-receiving layer is preferably 10% by mass or more, more preferably 30% by mass or more, and more preferably 50% by mass or more. Mass% is particularly preferred.

[0055] One mold release agent

The release agent is combined with the toner image receiving layer in order to prevent offset of the toner image receiving layer. The release agent used in the present invention is heated and melted at a fixing temperature, and is deposited on the surface of the toner image receiving layer, unevenly distributed on the surface of the toner image receiving layer, and further cooled and solidified to be used as a toner image receiving layer. If it forms a layer of release agent on the surface, the type is In particular, the limitation can be appropriately selected depending on the purpose.

 Examples of the release agent include at least one selected from silicone compounds, fluorine compounds, waxes, and matting agent power.

[0056] As the mold release agent, for example, compounds described in Sekishobo "Revised Wax Properties and Applications", published by Nikkan Kogyo Shimbun Co., Ltd., Silicone Knowbook can be used. Also, JP-B-59-38581, JP-B-4-32380, Patent No. 2838498, Patent No. 2949558, JP-A-50-117433, JP-A-52-52640, JP-A-57-148755, JP-A-6-62056, JP-A-61-62057, JP-A-61-118760, JP-A-2-42451, JP-A-3-41465, JP-A-4-212175, JP-A-4-212 214570, JP 4

— 263267, JP-A-5-34966, JP-A-5-119514, JP-A-6-59502, JP-A-6-161150, JP-A-6-175396, JP-A-6-219040, JP-A-6

— 230600, JP-A-6-295093, JP-A-7-36210, JP-A-7-43940, JP-A-7-56387, JP-A-7-56390, JP-A-7-64335, JP-A-7- 19 9681, JP-A-7-223362, JP-A-7-287413, JP-A-8-184992, JP-A-8-227180, JP-A-8-248671, JP-A-8-248799, JP-A-8- 248801, JP-A-8-278663, JP-A-9-152739, JP-A-9-160278, JP-A-9-185181, JP-A-9 319139, JP-A-9 319143, JP-A-10

— 20549, JP-A-10-48889, JP-A-10-198069, JP-A-10-207116, JP-A-11-2917, JP-A-11-44969, JP-A-11-65156, JP-A-11 Silicone compounds, fluorine compounds, and waxes that are used in the toners described in JP-A No. 73049 and JP-A-11-194542 can also be preferably used. A combination of these compounds can also be used.

 [0057] Examples of the silicone compound include silicone oil, silicone rubber, silicone fine particles, silicone-modified resin, reactive silicone compound, and the like.

[0058] Examples of the silicone oil include non-modified silicone oil, amino-modified silicone oil, carboxy-modified silicone oil, carbinol-modified silicone oil, bur-modified silicone oil, epoxy-modified silicone oil, polyether-modified silicone oil, and silanol. Modified silicone oil, methacrylic modified silicone oil, Mel Examples include capto-modified silicone oil, alcohol-modified silicone oil, alkyl-modified silicone oil, and fluorine-modified silicone oil.

 Examples of the silicone-modified resin include olefin resin, polyester resin, beer resin, polyamide resin, cellulose resin, phenoxy resin, salt butyl monoacetate resin, urethane resin, Examples thereof include acrylic resins, styrene-acrylic resins, and resins obtained by modifying these copolymer resins with silicone.

 [0059] The fluorine compound is not particularly limited and may be appropriately selected according to the purpose. Examples thereof include fluorine oil, fluorine rubber, fluorine-modified resin, fluorine sulfonic acid compound, fluorosulfonic acid, fluorine Examples thereof include an acid compound or a salt thereof, and an inorganic fluoride.

 [0060] The wax can be roughly classified into a natural wax and a synthetic wax.

 Among these natural waxes, plant-based waxes, animal-based waxes, mineral-based waxes, and at least one selected from oil-based wax power are preferred among these, and plant-based nuts are particularly preferable. As the natural wax, a water-dispersed wax is particularly preferable from the viewpoint of compatibility when an aqueous resin is used as the polymer for the toner image-receiving layer.

 [0061] The plant-based wax can be appropriately selected from publicly known medium strengths that are not particularly limited, and may be a commercial product or an appropriately synthesized product. Examples of the plant-based potato include carnauba wax, castor oil, rapeseed oil, soybean oil, wood wax, cotton wax, rice wax, sugarcane wax, candelilla wax, Japan wax, jojoba oil and the like.

 Examples of the commercial products of the carnauba wax include EMUS TAR-0413 manufactured by Nippon Seiki Co., Ltd., Cellozol 524 manufactured by Chukyo Yushi Co., Ltd., and the like. Examples of commercially available castor oil include refined castor oil manufactured by Ito Oil Co., Ltd.

 Among these, in particular, it is possible to provide an electrophotographic material capable of forming a high-quality image that is excellent in offset resistance, adhesion resistance, paper passing property, glossiness, and hardly cracks. Carnauba wax with a point of 70-95 ° C is particularly preferred.

[0062] The animal waxes can be appropriately selected from known, non-restricted, medium strengths such as beeswax, lanolin, spermaceti, stew (whale oil), and woolen cocoons.

[0063] The mineral wax is appropriately selected from known medium strengths that are not particularly limited. It may be a commercial product or may be appropriately synthesized. Examples include montan wax, montan ester wax, ozokerite, and ceresin. Among these, in particular, it is possible to provide an electrophotographic material capable of forming a high-quality image that is excellent in offset resistance, adhesion resistance, paper passing property, glossiness, and hardly cracks. Montan wax having a point of 70 to 95 ° C is particularly preferred.

[0064] The petroleum wax may be appropriately selected from publicly known intermediate forces that are not particularly limited, and may be a commercially available product or an appropriately synthesized product. For example, norafine wax, microcrystalline wax, petrolatum and the like can be mentioned.

[0065] The content in the toner image-receiving layer of the natural waxes, 0. l~4g / m ² is rather preferred, preferably from 0. 2~2g / m ² force! /ヽ.

When the content is less than 0.1 lgZm ² , offset resistance and adhesion resistance may be particularly insufficient. When it exceeds 4 gZm ² , the amount of wax is excessive, and the image quality of the formed image is poor. Sometimes.

 [0066] The melting point of the natural wax is, in particular, from the viewpoint of offset resistance and paper passing properties.

-95 ° C is preferred 75-90 ° C is more preferred.

[0067] The synthetic wax is classified into synthetic hydrocarbons, modified waxes, hydrogenated waxes, and other oil-based synthetic waxes. These waxes are preferably water-dispersed waxes from the viewpoint of compatibility when an aqueous thermoplastic resin is used as the thermoplastic resin of the toner image-receiving layer.

 [0068] Examples of the synthetic hydrocarbon include Fischer-Tropsch wax, polyethylene tuss, and the like.

 Examples of the oil-based synthetic wax include acid amide compounds (for example, stearic acid amide), acid imide compounds (for example, phthalic anhydride imide), and the like.

[0069] The modified wax is not particularly limited and may be appropriately selected depending on the purpose.

Examples thereof include amine-modified wax, acrylic acid-modified wax, fluorine-modified wax, olefin-modified wax, urethane type wax, alcohol type wax and the like.

[0070] The hydrogenated wax is not particularly limited and may be appropriately selected depending on the purpose. Examples thereof include hydrogenated castor oil, castor oil derivatives, stearic acid, lauric acid, myristic acid, Palmitic acid, behenic acid, sebacic acid, undecylenic acid, heptylic acid, maleic acid, highly maleated oil, and the like.

 [0071] The melting point of the release agent is preferably from 70 to 95 ° C, more preferably from 75 to 90 ° C, particularly from the viewpoint of offset resistance and paper passing properties.

 As the release agent added to the toner image-receiving layer, derivatives, oxides, purified products, and mixtures thereof can also be used. They also have reactive substituents.

 [0072] The content of the release agent is preferably 0.1 to 10% by mass force S, more preferably 0.3 to 8.0% by mass, based on the mass of the toner image-receiving layer. More preferably, 0% by mass. When the content is less than 0.1% by mass, the offset resistance and the adhesion resistance may be insufficient. When the content exceeds 10% by mass, the amount of the release agent is excessively large. The image quality of S may decrease.

 [0073] Plasticizer

 As the plasticizer, a known plasticizer for resin having no particular limitation can be appropriately selected according to the purpose. The plasticizer has a function of adjusting the flow or flexibility of the toner image-receiving layer by heat or pressure when fixing the toner.

 The plasticizers include “Chemical Handbook” (edited by the Chemical Society of Japan, Maruzen), “Plasticizers Theory and Application 1” (edited by Koichi Murai, Koshobo), “Research on plasticizers” "(Polymer Chemical Society)," Handbook Rubber 'Plastic Compounded Chemicals "(Rubber Digest Co., Ltd.), etc.

[0074] The plasticizer may be described as a high-boiling organic solvent, a thermal solvent, or the like. 1S For example, JP 59-83154, JP 59-178451, JP 59- 178453, JP 59-178454, JP 59-178455, JP 59-178457, JP 62-174754, JP 62-245253, JP 61-209444 JP-A-61-200538, JP-A-62-8145, JP-A-62-9348, JP-A-62-30247, JP-A-62-136646, JP-A-2-235694, etc. Esters such as those described in each publication (for example, phthalic acid esters, phosphoric acid esters, fatty acid esters, abietic acid esters, adipic acid esters, sebacic acid esters, Acid esters, benzoic acid esters, butyric acid esters, epoxidized fatty acid esters, glycolic acid esters, propionic acid esters, trimellitic acid esters, citrate esters, sulfonic acid esters, carvone Acid esters, succinic esters, maleates, fumarates, phthalates, stearates, etc.), amides (e.g. fatty acid amides, sulfoamides, etc.), ethers, alcohols , Latatones, polyethyleneoxy compounds and the like.

 These plasticizers can be used by mixing with cocoa butter.

[0075] As the plasticizer, a polymer having a relatively low molecular weight can be used. The molecular weight of the plasticizer is lower than the molecular weight of the binder resin to be plasticized, the preferred molecular weight is preferably 15,000 or less, and more preferably 5,000 or less. In the case of a polymer plasticizer, the polymer is preferably the same type as the binder resin to be plasticized. For example, low molecular weight polyester is preferable for the plasticity of polyester resin. Furthermore, oligomers can also be used as plasticizers.

 In addition to the compounds listed above, commercially available products include, for example, Ade force sizer PN-170, PN-1430 (all manufactured by Asahi Denka Kogyo Co., Ltd.), PARAPLEX-G-25, G-30 G-40 (all manufactured by CP HALL), ester gum 8L—JA, ester R—95, Pentalin 4851, FK115, 4820, 830, Louisol 28—JA, Picorastic A75, Picotex LC, Crystallex 3085 ( , The gap is also made by Hercules Co., Ltd.)

[0076] The plasticizer includes stress and strain generated when toner particles are embedded in the toner image receiving layer (physical strain such as elastic force and viscosity, strain due to material balance such as molecules, binder main chain, and pendant portion). Etc.) can be optionally used to relax.

 The plasticizer may be in a micro-dispersed state in the toner image-receiving layer, in a micro-phase-separated state in a sea-island shape, or in a sufficiently mixed and dissolved state with other components such as a binder. .

 The content of the plasticizer in the toner image-receiving layer is preferably from 0.001 to 90% by mass, more preferably from 0.1 to 60% by mass, and even more preferably from 1 to 40% by mass.

The plasticizer is used for adjusting the smoothness (improving transportability by reducing the frictional force) and fixing unit offset. It may be used for the purpose of improving the toner (peeling of the toner or the layer to the fixing portion), adjusting the curl balance, and adjusting the charging (forming the toner electrostatic image).

 [0077] One colorant

 The colorant is not particularly limited and can be appropriately selected according to the purpose, and examples thereof include a fluorescent brightener, a white pigment, a colored pigment, and a dye.

 The fluorescent brightening agent can be appropriately selected from known compounds that are not particularly limited as long as they are known compounds that absorb in the near ultraviolet region and emit fluorescence at 400 to 500 nm. For example, K. VeenRataraman Preferred examples include the compounds described in ed. Fhe Chemistry of Synthetic Dyes' V 8. The fluorescent whitening agent may be a commercially available product or a compound synthesized as appropriate. For example, a stilbene compound, a coumarin compound, a biphenyl compound, a benzoxazoline compound , Naphthalimide compounds, pyrazoline compounds, carbostyryl compounds, and the like. Examples of the commercially available products include white full fur PSN, PHR, HCS, PCS, B (all manufactured by Sumitomo Chemical Co., Ltd.), UVITEX-OB (manufactured by Ciba-Geigy), and the like.

 [0078] The white pigment can be appropriately selected according to the purpose from known ones that are not particularly limited. For example, inorganic pigments such as titanium oxide and calcium carbonate can be used.

 [0079] The colored pigment can be appropriately selected from known ones that are not particularly limited, depending on the purpose. For example, various pigments and dyes described in JP-A-63-44653, etc. Zo pigment, polycyclic pigment, condensed polycyclic pigment, lake pigment, carbon black and the like.

 Examples of the azo pigment include azo lake (for example, Carmine 6B, Red 2B, etc.), insoluble azo pigment (for example, monoazo yellow, disazo yellow, pyrazo mouth orange, balkan orange, etc.), condensed azo pigment (for example, chromophthalate). Yellow, chromophthaled red) and the like.

 Examples of the polycyclic pigment include phthalocyanine pigments such as copper phthalocyanine blue and copper phthalocyanine green.

Examples of the condensed polycyclic pigment include dioxazine pigments (for example, dioxazine bio , Etc.), isoindolinone pigments (for example, isoindolinone yellow), selenium pigments, perylene pigments, perinone pigments, and thioindigo pigments.

 Examples of the lake pigment include malachite green, rhodamine B, rhodamine G, and vitamin tria blue B.

 Examples of the inorganic pigment include oxides (for example, titanium dioxide, bengara, etc.) sulfates (for example, precipitated barium sulfate), carbonates (for example, precipitated calcium carbonate), oxalates (for example, water-containing materials) Succinate, anhydrous succinate, etc.), metal powders (for example, aluminum powder, bronze powder, zinc dust, yellow lead, and bitumen).

 These may be used alone or in combination of two or more.

[0080] The dye can be appropriately selected from known ones without particular limitations according to the purpose, and examples thereof include anthraquinone compounds and azo compounds. These may be used alone or in combination of two or more.

 Examples of water-insoluble dyes include vat dyes, disperse dyes, and oil-soluble dyes. Examples of the vat dye include CI Vat Violet 1, CI Vat Violet 2, CI Vat Violet 9, CI Vat Violet 13, CI Vat Violet 21, CI Vat Blue 1, CI Vat Blue 3, CI Vat Blue 4, CI Vat Blue 6, CI Vat Blue 14, CI Vat Blue 20, CI Vat Blue 35, etc. Examples of the disperse dyes include C. I. Days Spurs Violet 1, C. I. Days Spurs Violet 4, C. I. Days Spurs Violet 10, C. I. Days Spurs Blue 3, C. I. Days Spurs Blue 7, C. I. Days Spurs Blue 58, and the like. Examples of the oil-soluble dye include CI Solvent Violet 13, CI Solvent Violet 14, CI Solvent Violet 21, CI Solvent Violet 27, CI Solvent Blue 11, CI Solvent Blue 12, CI Solvent Blue 25, CI Solvent Blue 55, Etc.

 In addition, a colored coupler used in silver salt photography can also be suitably used.

[0081] of the colorant, the content in the toner image-receiving layer is preferably is 0. l~8g / m ² fixture 0. 5~5g / m ² is more preferable.

When the content of the colorant is less than 0.1 lgZm ² , the light transmittance in the toner image-receiving layer When it exceeds 8 g / m ² , handling properties such as cracking and adhesion resistance may be inferior.

 Among the colorants, the amount of the pigment added is preferably 40% by mass or less, more preferably 30% by mass or less, more preferably 20% by mass based on the mass of the thermoplastic resin constituting the toner image-receiving layer. The following is more preferable.

[0082] Examples of the filler include organic or inorganic fillers, and known reinforcing agents, fillers, and reinforcing materials for binder resin can be used. Refer to “Handbook Rubber 'Plastic Compounding Chemicals” (edited by Rubber Digest Co., Ltd.), “New Plastic Plastic Compounding Basics and Applications” (Taisei), “Fila I Handbook” (Taisei), etc. Can be selected.

 Further, as the filler, an inorganic filler or an inorganic pigment can be used. Examples of the inorganic filler or inorganic pigment include silica, alumina, titanium dioxide, zinc oxide, zirconium oxide, mica-like iron oxide, white lead, lead oxide, nickel oxide, strontium chromate, molybdenum. Pigments, smectite, magnesium oxide, calcium carbonate, calcium carbonate, mullite and the like. Of these, silica and alumina are particularly preferable. These may be used alone or in combination of two or more. As the filler, one having a small particle size is preferable. If the particle size is large, the surface of the toner image-receiving layer tends to be roughened.

 [0083] The silica includes spherical silica and amorphous silica. The silica can be synthesized by a dry method, a wet method, or an air-mouth gel method. The surface of the hydrophobic silica particles may be surface-treated with a trimethylsilyl group or silicone. As the silica, colloidal silica is preferable. The silica is preferably porous.

[0084] The alumina includes anhydrous alumina and alumina hydrate. As the crystal form of the anhydrous alumina, α, | 8, γ, δ, ζ, 7 ?, θ, κ, ρ, or c can be used, and alumina hydrate is preferable to anhydrous alumina. . As the alumina hydrate, monohydrate or trihydrate can be used. The monohydrate includes pseudo boehmite, boehmite and diaspore. The trihydrate includes dibsite and bayerite. The alumina is preferably porous. The alumina hydrate can be synthesized by a sol-gel method in which ammonia is precipitated in an aluminum salt solution or by a method of hydrolyzing an alkali aluminate. The anhydrous alumina can be obtained by dehydrating alumina hydrate by heating.

 [0085] The addition amount of the filler is preferably 5 to 2,000 parts by mass with respect to 100 parts by mass of the dry mass of the binder of the toner image-receiving layer.

 [0086] The crosslinking agent can be blended in order to adjust the storage stability, thermoplasticity, and the like of the toner image-receiving layer. As the crosslinking agent, a compound having two or more epoxy groups, isocyanate groups, aldehyde groups, active halogen groups, active methylene groups, acetylene groups and other known reactive groups in the molecule as reactive groups is used.

 As the cross-linking agent, a compound having two or more groups capable of forming a bond by a hydrogen bond, an ionic bond, a coordinate bond, or the like can be used.

 As the cross-linking agent, for example, known compounds can be used as a coupling agent, a curing agent, a polymerization agent, a polymerization accelerator, a coagulant, a film-forming agent, a film-forming auxiliary, and the like. Examples of the coupling agent include chlorosilanes, bursilanes, epoxy silanes, aminosilanes, alkoxyaluminum chelates, titanate coupling agents and the like, and “Handbook Rubber'Plastic Compounding Chemicals” (Rubber Digest Co., Ltd.). Ed.) Can be used.

 [0087] The toner image receiving layer preferably contains a charge adjusting agent in order to adjust the transfer or adhesion of the toner or to prevent the toner image receiving layer from being charged and adhered.

 The charge control agent is not particularly limited, and various conventionally known charge control agents can be appropriately used depending on the purpose. For example, a cationic surfactant, an anionic surfactant, an amphoteric surfactant, In addition to surfactants such as nonionic surfactants, polymer electrolytes, conductive metal oxides, and the like can be used. Specific examples include quaternary ammonium salts, polyamine derivatives, cationic antistatic agents such as cation-modified polymethyl metatalylate and cation-modified polystyrene, alkyl phosphates, and key-ons such as cation-based polymers. Nonionic antistatic agents such as antistatic agents, fatty acid esters, and polyethylene oxide.

In the case where the toner has a negative charge, a charge adjusting agent blended in the toner image receiving layer and For example, cation cyano-one is preferable.

 Examples of the conductive metal oxide include ZnO, TiO, SnO, Al 2 O, In 2 O, Si

 2 2 2 3 2 3

O, MgO, BaO, MoO, etc. can be mentioned. These can be used alone.

twenty three

 Two or more types may be used in combination. The conductive metal oxide may further contain (doping) a different element. For example, Zn, Al, In, etc. ZnO, Nb, T

 2

 a, SnO can contain (doping) Sb, Nb, halogen elements, etc.

 2

 wear.

 [0088] Other additives

 The material that can be used for the toner image-receiving layer may contain various additives for improving the stability of the output image and improving the stability of the toner image-receiving layer itself. Examples of the additive include various known antioxidants, anti-aging agents, deterioration inhibitors, ozone deterioration inhibitors, ultraviolet absorbers, metal complexes, light stabilizers, antiseptics, fungicides, and the like. It is done.

 [0089] The antioxidant can be appropriately selected according to the purpose without any particular limitation. For example, chroman compound, coumaran compound, phenol compound (eg, hindered phenol), no, idroquinone. Derivatives, hindered amine derivatives, and spiroindane compounds. Incidentally, the above-mentioned anti-oxidation agent is described in JP-A 61-159644.

 [0090] The anti-aging agent can be appropriately selected according to the purpose for which there is no particular limitation. For example, "Handbook Rubber 'Plastic Compounding Chemicals Revised 2nd Edition" (1993, Rubber Digest Corporation) p76-121 The thing of description is mentioned.

 [0091] The ultraviolet absorber can be appropriately selected according to the purpose without any particular limitation, and examples thereof include benzotriazole compounds (see US Pat. No. 3,533,794), 4-thiazolidone Examples include compounds (see U.S. Pat. No. 3,526,811), benzophenone compounds (see JP-A 46-2784), and UV-absorbing polymers (see JP-A 62-260152).

[0092] The metal complex can be appropriately selected depending on the purpose without any particular limitation. For example, US Patent No. 4241155, US Patent No. 4245018, US Patent No. 4254195 , JP-A 61-88256, JP-A 62-174741 In addition, those described in JP-A-63-199248, JP-A-1-75568 and JP-A-1-74272 are suitable.

 In addition, UV absorbers and light stabilizers described in "Handbook Rubber'Plastic Compounding Chemicals Revised 2nd Edition" (1993, Rubber Digest Co., Ltd.) p 122-137 can also be suitably used.

Note that, as described above, known photographic additives can be added to the materials that can be used for the toner image-receiving layer, as necessary. Examples of the photographic additive include, for example, Research Disclosure Journal (hereinafter abbreviated as RD) No. 17643 (December 1978), RD No. 18716 (November 1979) and RD No. 307105 (1989). (November), and the corresponding parts are summarized in the table below.

 [0094] [Table 1]

 The toner image-receiving layer is provided by applying a coating solution containing the thermoplastic resin for toner image-receiving layer on the support with a wire coater or the like and drying. The minimum film forming temperature (MFT) of the thermoplastic resin is preferably 100 ° C. or lower for fixing toner particles, which is preferably room temperature or higher for storage before printing.

[0096] The coating weight of the toner image-receiving layer after drying is, for example, preferably 1 to ²⁰ gZm ^2, more preferably 4 to 15 g / m ² ! / ヽ.

The thickness of the toner image-receiving layer can be appropriately selected according to the purpose for which there is no particular limitation. For example, the thickness of the toner used is preferably 1 to 3 times the particle diameter of the toner, and the thickness is 1 to 3 times. More specifically, 1-50 / ζ πι is preferred 1-30 / ζ πι is more preferred 2- 20 μm force is more preferred, 5-15 μm force is particularly preferred! / ヽ.

[0097] [Physical properties of toner image-receiving layer]

 The toner image-receiving layer has a 180 ° peel strength at a fixing temperature with the fixing member of preferably 0.1 NZ 25 mm or less, more preferably 0.041 NZ 25 mm or less. The 180 degree peel strength can be measured in accordance with the method described in JIS K6887 using the surface material of the fixing member.

 The toner image receiving layer preferably has a high whiteness. The whiteness is preferably 85% or more as measured by the method defined in JIS P 8123. Also, 440ηπ! The spectral reflectance is preferably 85% or more in the wavelength range of ˜640 nm, and the difference between the maximum spectral reflectance and the minimum spectral reflectance in the same wavelength region is preferably within 5%. Furthermore, 400ηπ! The spectral reflectance is preferably 85% or more in the wavelength range of ~ 700 nm, and the difference between the maximum spectral reflectance and the minimum spectral reflectance in the same wavelength region is more preferably within 5%.

Specifically, as the whiteness, in the CIE 1976 (L * a * b *) color space, the L * value is preferably 80 or more, more preferably 85 or more, and still more preferably 90 or more. The white color is preferably as neutral as possible. As for the white color, in the L * a * b * space, the value of (a *) ² + (b *) ² is preferably 50 or less, more preferably 18 or less, and even more preferably 5 or less.

 The toner image-receiving layer preferably has high gloss after image formation. As the glossiness, in all areas up to the maximum density of black with white power without toner, 60 degrees or more is preferable for 45 degree luminous intensity, more preferably 90 or more, more preferably 75 or more.

 However, the glossiness is preferably 110 or less. If it exceeds 110, it becomes a metallic luster and is not preferable as an image quality.

 Here, the glossiness can be measured based on, for example, JIS Z8741.

[0099] The toner image-receiving layer preferably has high smoothness after fixing. As the smoothness, in all areas from white to the maximum density of black with no toner, the arithmetic average roughness (Ra) is preferably 3 μm or less, more preferably 1 μm or less. Preferred is 0.5 m or less. Here, the arithmetic average roughness can be measured based on, for example, JIS B0601, JIS B0651, JIS B0652. [0100] It is more preferable that the toner image-receiving layer has physical properties of all items more preferably having physical properties of a plurality of items, preferably having physical properties of one item in the following items. .

 (1) The Tm (melting temperature) of the toner image-receiving layer is preferably 30 ° C or more, and preferably Tm + 20 ° C or less.

(2) The temperature at which the toner image-receiving layer has a viscosity of 1 × 10 ⁵ cp is preferably 40 ° C. or higher and lower than that of the preferred toner.

(3) Storage elastic modulus (G ′) force at the fixing temperature of the toner image-receiving layer 1 X 10 ² to 1 X 10 ⁵ Pa, loss elastic modulus (G ,,) force 1 X 10 ² to 1 X 10 ⁵ Pa are preferable .

 (4) The loss tangent (G "ZG,), which is the ratio of the loss elastic modulus (G") at the fixing temperature of the toner image-receiving layer and the storage elastic modulus (G '), is preferably 0.01 to 10.

 (5) The storage elastic modulus (G ′) at the fixing temperature of the toner image-receiving layer is preferably −50 to +2500 with respect to the storage elastic modulus (G ′) at the fixing temperature of the toner.

 (6) The inclination angle of the molten toner on the toner image-receiving layer is preferably 50 ° or less, more preferably 40 ° or less.

 The toner image-receiving layer satisfies the physical properties disclosed in Japanese Patent No. 2788358, Japanese Patent Laid-Open No. 7-248637, Japanese Patent Laid-Open No. 8-305067, Japanese Patent Laid-Open No. 10-239889, etc. Is preferred.

The surface electrical resistance of the toner image-receiving layer is preferably in the range of 1 × 10 ⁶ to 1 × 10 ¹⁵ ΩΖη ² (under the condition of 25 ° C.—65% RH).

If the surface resistance is less than 1 × 10 ⁶ ΩΖη ² , the toner image may have a low toner density when the toner is transferred to the toner image-receiving layer. Χ 10 ¹⁵ Ω Ζ. If it exceeds πι ² , an unnecessarily large charge is generated at the time of transfer, the toner is not sufficiently transferred, and electrostatic charges are easily deposited during the handling of the electrophotographic material having a low image density. Misfeeds, double feeds, discharge marks, toner transfer defects, etc. may occur during copying.

Here, the surface electrical resistance is in accordance with JIS K6911, the sample is conditioned at a temperature of 20 ° C and a humidity of 65% for 8 hours or more, and R8340 manufactured by Advantest Corporation is used in the same environment. It can be obtained by measuring the voltage after applying it for 1 minute under the condition of an applied voltage of 100V.

 [0102] [Other layers]

 Examples of the other layers in the electrophotographic material include a surface protective layer, a back layer, an adhesion improving layer, an intermediate layer, an undercoat layer, a cushion layer, a charge control (prevention) layer, a reflection layer, a color adjustment layer, and storage. Examples thereof include a property improving layer, an adhesion preventing layer, an anti-curl layer, and a smoothing layer. These layers may have a single layer structure or may be composed of two or more layers.

 [0103] Surface protective layer

 The surface protective layer is used for the purpose of protecting the surface of the electrophotographic material, improving storability, improving handleability, imparting writing properties, improving instrument passability, imparting anti-offset properties, etc. It can be provided on the surface of the layer. The surface protective layer may be a single layer or may have a layer strength of two or more layers. In the surface protective layer, various thermoplastic resins, thermosetting resins and the like can be used as a binder, and it is preferable to use the same type of resin as the toner image receiving layer. However, the thermodynamic characteristics, electrostatic characteristics, etc. can be optimized without having to be the same as that of the toner image-receiving layer.

 [0104] The surface protective layer may contain the various additives described above that can be used for the toner image-receiving layer. In particular, the surface protective layer can be blended with other additives such as a matting agent in addition to the release agent used in the present invention. The matting agent includes various known ones.

 The outermost surface layer in the electrophotographic material (for example, a surface protective layer when a surface protective layer is formed) preferably has good compatibility with the toner from the viewpoint of fixability. Specifically, the contact angular force with the melted toner is preferably, for example, 0 to 40 degrees.

 [0105] Back layer

 In the electrophotographic material, the back layer is provided on the opposite side of the toner image-receiving layer with respect to the support for the purpose of imparting back surface output suitability, improving back surface output image quality, improving curl balance, and improving device passability. Is preferred.

The color of the back layer is not particularly limited, but the electrophotographic material is also printed on the back surface. In the case of a double-sided output type image receiving sheet for forming an image, the back layer is preferably also white. The whiteness and spectral reflectance are preferably 85% or more, as with the surface.

 Further, in order to improve the duplex output suitability, the structure of the knock layer may be the same as that of the toner image receiving layer side. Various additives described above can be used for the knock layer. As such an additive, it is particularly suitable to add a matting agent, a charge adjusting agent, or the like. The knock layer may have a single layer structure or a laminated structure of two or more layers.

 In order to prevent offset at the time of fixing, when a release oil is used for the fixing roller or the like, the knock layer may be oil absorbing.

 The thickness of the back layer is usually preferably from 0.1 to LO / z m.

[0106] Adhesion improving layer, etc.

 The adhesion improving layer is preferably formed for the purpose of improving the adhesion between the support and the toner image-receiving layer in the electrophotographic material. The above-mentioned various additives can be blended in the adhesion improving layer, and it is particularly preferable to blend a crosslinking agent. The electrophotographic material of the present invention preferably further comprises a cushion layer or the like between the adhesion improving layer and the toner image receiving layer in order to improve toner acceptability.

[0107] Middle layer

 The intermediate layer is formed, for example, between the support and the adhesion improving layer, between the adhesion improving layer and the cushion layer, between the cushion layer and the toner image receiving layer, and between the toner image receiving layer and the storage stability improving layer. Can do. Of course, in the case of an electrophotographic material comprising a support, a toner image-receiving layer, and an intermediate layer, the intermediate layer can be present, for example, between the support and the toner image-receiving layer.

 [0108] The thickness of the electrophotographic material of the present invention is a force that can be appropriately selected according to the purpose for which there is no particular limitation. For example, 50 to 550 m force S is preferable, and 100 to 350 m force S is more preferable. Better ,.

 [0109] <Toner>

 The electrophotographic material of the present invention is used by allowing the toner image receiving layer to receive toner during printing or copying.

The toner contains at least a binder resin and a colorant, and if necessary, It contains a release agent and other components.

 [0110] Toner binder

 The binder resin can be appropriately selected according to the purpose from those used in ordinary toners without any particular restrictions. For example, styrenes such as styrene and chlorostyrene; burenaphthalene, Bull esters such as butyl chloride, bromide, fluoride, acetate, propionate, benzoate and butyrate; methyl acrylate, ethyl acrylate, n-butyl acrylate, isobutyl acrylate, acrylic acid Methylene aliphatic carboxylic acid esters such as dodecyl, n-octyl acrylate, 2-chloroethyl acrylate, phenyl acrylate, methyl chloroacrylate, methyl methacrylate, ethyl methacrylate, butyl methacrylate; acrylonitrile, methacryl Mouth-tolyl, acrylamide, etc. Butyl compounds such as butyl methyl ether, butyl ether ether, butyl isobutyl ether; Ν bur pyrrole, Ν vinylcarbazole, Ν bur indole, Ν vinyl pyrrolidone, etc. ビ ュ butyl compounds; methacrylic acid, acrylic A homopolymer of a bull monomer such as a bull carboxylic acid such as acid or cinnamic acid or a copolymer thereof, and various polyesters can be used, and various waxes can be used in combination.

 Among these resins, it is preferable to use the same type of resin as that used for the toner image-receiving layer.

[0111] Colorant of toner—

The colorant is not particularly limited and can be appropriately selected according to the purpose from those used in normal toners, such as carbon black, chrome yellow, hansa yellow, benzine yellow, slen yellow, quinoline yellow. , Permenento Range GTR, Pyrazolone Orange, Nolecan Orange, Watch Young Red, Permanent Red, Brilliantamine 3B, Brilliantamine 6B, Dupont Oil Red, Pyrazolone Red, Risonorred Red, Rhodamine B Lake, Lake Red C, Rose Benganore , Ryuji Phosphorus Blue, Ultramarine Blue, Calco Oil Blue, Methylene Blue Mouth Ride, Phthalocyan Blue, Phthalocyan Green, Malachite Green Oxalate, etc. The Also, atalidine, xanthene, azo, benzoquinone, Gin, anthraquinone, thioindico, dioxazine, thiazine, azomethine, indico, thioindico, phthalocyanine, aniline black, polymethine, triphenylmethane, diphenylmethane, thiazine, thiazole, xanthene And various dyes.

 These colorants may be used alone or in combination of two or more. The content of the colorant is not particularly limited and can be appropriately selected according to the purpose, and is preferably in the range of 2 to 8% by mass. When the content of the colorant is less than 2% by mass, the coloring power may be weakened, and when it exceeds 8% by mass, the transparency may be impaired.

[0112] Toner release agent

 The release agent is not particularly limited and can be appropriately selected according to the purpose from those used in normal toners. For example, a relatively low molecular weight high crystalline polyethylene wax, Fischer-Tropsch wax is used. In particular, polar waxes containing nitrogen such as amide waxes and compounds having urethane bonds are particularly effective.

 The molecular weight of the polyethylene wax is preferably 1,000 or less, more preferably from 300 to 1,000 forces.

 The compound having a urethane bond is preferable because even if it has a low molecular weight, the solid state can be maintained and the melting point can be set high for the molecular weight due to the strength of cohesive force due to the polar group. A preferable range of the molecular weight is 300 to 1,000. The raw materials are a combination of diisocyanate compounds and monoalcohols, a combination of monoisocyanic acid and monoalcohol, a combination of dialcohols and monoisocyanic acid, a combination of trialcohols and monoisocyanic acid, Various combinations such as combinations of triisocyanate compounds and monoalcohols can be selected, but in order not to increase the molecular weight, combinations of polyfunctional and monofunctional groups are combined. It is preferable that the amount of functional groups be equal.

[0113] Examples of the monoisocyanate compound include dodecyl isocyanate, phenol and its derivatives, naphthyl isocyanate, hexyl isocyanate, benzyl isocyanate, butyl isocyanate, allylic isocyanate and the like. Is mentioned.

Examples of the diisocyanate compound include, for example, tolylene diisocyanate, diisocyanate 4, 4, diphenol methane, toluene diisocyanate, diisocyanate 1, 3 phenol, Examples include hexamethylene diisocyanate, 4-methyl m-phenolene diisocyanate, and isophorone disoocyanate.

 Examples of the monoalcohol include methanol, ethanol, propanol, butanol, pentanol, hexanol, heptanol and the like.

 Examples of the dialcohols include numerous glycols such as ethylene glycol, diethylene glycol, triethylene glycol, and trimethylene glycol; examples of the trial alcohols include trimethylolpropane, triethylolpropane, and trimethanolethane.

 [0114] These urethane composites can be used as a kneaded and pulverized toner by mixing with a resin and a colorant at the time of kneading, as in a normal release agent. Further, when used in the above emulsion polymerization aggregation melting toner, it is dispersed in water together with an ionic surfactant, a polymer electrolyte such as a polymer acid or a polymer base, and heated to a temperature equal to or higher than the melting point, It can be made into fine particles by applying strong shear with a pressure discharge type disperser, and a release agent particle dispersion of 1 μm or less can be prepared and used together with a resin particle dispersion, a colorant dispersion and the like.

[0115] Other components of toner

 In addition, other components such as an internal additive, a charge control agent, and inorganic fine particles can be mixed with the toner. As the internal additive, for example, a magnetic material such as a metal such as ferrite, magnetite, reduced iron, cobalt, nickel, manganese, an alloy, or a compound containing these metals can be used.

[0116] As the charge control agent, for example, a quaternary ammonium salt compound, a niggincin compound, a dye having a complex power such as aluminum, iron or chromium, or a triphenylmethane pigment is usually used. Various charge control agents can be used. A material that is difficult to dissolve in water is preferable because it controls the ionic strength that affects the stability during agglomeration and melting, and reduces the contamination of wastewater.

[0117] As the inorganic fine particles, for example, all external additives on the toner surface such as silica, alumina, titer, calcium carbonate, magnesium carbonate, tricalcium phosphate, etc. can be generally used, and they are used at the ionic interface. It is preferable to use it dispersed with an activator, polymer acid or polymer base. [0118] Furthermore, surfactants can be used for emulsion polymerization, seed polymerization, pigment dispersion, resin particle dispersion, release agent dispersion, aggregation, and their stability. For example, sulfate-based, sulfonate-based, phosphate-based, soap-based surfactant surfactants, amine salt-type, quaternary ammonium salt-type cationic surfactants, etc. It is also effective to use nonionic surfactants such as polyethylene glycol, alkylphenol ethylene oxide adducts, and polyhydric alcohols in combination. As the dispersing means at that time, a general means such as a rotary shear type homogenizer, a ball mill having media, a sand mill, a dyno mill, or the like can be used.

 [0119] An external additive may be further added to the toner as necessary. Examples of the external additive include inorganic particles and organic particles. Examples of the inorganic particles include SiO, TiO, AlO, CuO, ZnO, SnO, FeO, MgO, BaO, CaO, K0, Na0, and Z.

2 2 2 3 2 2 3 2 2 rO, CaO-SiO, K O-(TiO), Al O-2SiO, CaCO, MgCO, BaSO, Mg

2 2 2 2 n 2 3 2 3 3 4 so and the like. Examples of the organic particles include fatty acids or derivatives thereof.

Four

 Further, powders of these metal salts, etc., rosin powders such as fluorine-based resin, polyethylene resin, and acrylic resin can be used.

 The average particle size of these particles is, for example, 0.01 to 5 111 particles, more preferably 0.1 to 2 / ζ πι.

 [0120] The method for producing the toner can be appropriately selected depending on the purpose without any particular limitation. (I) The aggregated particle dispersion is formed by forming aggregated particles in a dispersion obtained by dispersing the resin particles. A step of preparing, (ii) a step of adding and mixing a fine particle dispersion in which fine particles are dispersed in the aggregated particle dispersion and attaching the fine particles to the aggregated particles to form attached particles, and (iii) It is preferable that the toner is manufactured by a toner manufacturing method including the step of heating and fusing the adhered particles to form toner particles.

 [0121] Physical properties of toner

The volume average particle size of the toner is preferably 0.5 μm or more and 10 μm or less. If the volume average particle diameter of the toner is too small, toner handling (replenishability, tallying properties, fluidity, etc.) may be adversely affected, and particle productivity may be reduced. On the other hand, if the volume average particle diameter of the toner is too large, it is caused by graininess and transferability. Image quality and resolution may be adversely affected.

 The toner preferably satisfies the volume average particle size range of the toner and has a volume average particle size distribution index (GSDv) of 1.3 or less.

 The ratio (GS DvZGSDn) of the volume average particle size distribution index (GSDv) to the number average particle size distribution index (GSDn) is preferably 0.95 or more.

 The toner preferably satisfies the range of the volume average particle diameter of the toner, and the average value of the shape factor represented by the following formula is preferably 1.00-1.50.

 Shape factor = (兀) 7 (4 3)

 (However, L is the maximum length of toner particles, and S is the projected area of toner particles.)

 When the toner satisfies the above conditions, it is effective for image quality, particularly graininess, and resolution, and handling properties are adversely affected even if the average particle size, which is difficult to cause omission and blurring due to transfer, is not small. It becomes difficult to come out.

It should be noted that the storage elastic modulus G ′ (measured at an angular frequency lOmdZsec) at 150 ° C. of the toner itself is 1 × 10 ² to 1 × 10 ⁵ Pa. This is appropriate from the viewpoint of preventing sex.

[0123] <Thermal material>

 The heat-sensitive material has, for example, a structure in which at least a heat-sensitive recording layer is provided as the image-recording layer on the image-recording material support of the present invention, and repeated heating by a heat-sensitive head and fixing by ultraviolet rays. Examples of the thermosensitive material used in the thermoautochrome method (TA method) for forming an image by the above method.

[0124] <Sublimation transfer material>

 The sublimation transfer material has, for example, a configuration in which an ink layer containing at least a heat diffusible dye (sublimation dye) is provided as the image recording layer on the support for image recording material of the present invention. And a sublimation transfer method in which a heat-diffusible dye is transferred from an ink layer onto a sublimation transfer sheet by heating with a thermal head.

[0125] <Thermal transfer material>

The thermal transfer material has, for example, a structure in which at least a heat-meltable ink layer is provided as the image recording layer on the support for image recording material of the present invention, and is used in a thermal head. For example, the ink may be melted and transferred from a heat-meltable ink layer to a heat transfer sheet by heating.

 [0126] <Heat development material>

 As the heat developing material, on the support for image recording material of the present invention, a photothermographic recording layer as described in, for example, JP-A-2002-40643 is provided as the image recording layer. A visible image is formed by heating the heat-developable material that has been subjected to printing and exposure with a heating method using any one of a heating roller, a heating belt, a plate heater, a thermal head, a laser, and a combination thereof. That can do that.

 Further, the image recording material support of the present invention has a structure in which a photothermographic layer as described in, for example, JP-A-2004-246026 is provided as the image recording layer, and printing is performed. A material capable of forming a visible image by heating the exposed heat developing material by a heating method using any one of a heating roller, a heating belt, a plate heater, a thermal head, a laser, and a combination thereof. Can be mentioned.

 [0127] Silver salt photographic material>

 As the silver salt photographic material, for example, on the support for image recording material of the present invention, an image that develops at least yellow (Y), magenta (M), and cyan (C) as the image recording layer. Halogenated silver which has a structure with a recording layer and is color-developed, bleach-fixed, washed with water, and dried by passing the baked and exposed silver halide photographic sheet through a plurality of processing baths Photographic system, etc.

 [0128] <Inkjet recording material>

 As the ink jet recording material, for example, on the support for image recording material of the present invention, as the image recording layer, a liquid ink such as a water-based ink (using a dye or pigment as a coloring material) and an oil-based ink, The colorant receiving layer is solid at room temperature and can receive solid ink or the like that is melted and liquefied and used for printing.

 [0129] <Printing paper>

The image recording material support is also preferably used as printing paper. When used as printing paper, it has high mechanical strength because it is coated with ink by a printing machine. Is preferred.

 The printing paper is particularly suitable as offset printing paper, and can also be used as relief printing paper, gravure printing paper, and electrophotographic paper.

 The image recording material of the present invention has a high image quality because it has a support for image recording material without occurrence of recording unevenness and fixing unevenness without occurrence of blisters and the image recording layer on the support. An image can be recorded and is suitable as an electrophotographic material, a heat-sensitive material, a sublimation transfer material, a heat transfer material, a heat development material, a silver salt photographic material, and an ink jet recording material.

[0131] (Image recording method)

 In the first embodiment, the image recording method of the present invention, in the first embodiment, forms an image by heating a thermal recording material having at least a thermal recording layer on the support for image recording material of the present invention using a thermal head and a laser V or a deviation. An image recording process for recording the image, and further including other processes as necessary.

 As the image recording step, there is no particular limitation except for using a heat-sensitive recording material having at least a heat-sensitive recording layer on the image-recording material support of the present invention. It can be appropriately selected depending on the case.

 The thermal head can be appropriately selected according to the purpose for which there is no particular limitation. For example, an area-type thermal head in which a plurality of heating elements are arranged vertically and horizontally in a predetermined area, and a plurality of heating elements. A line-type thermal head in which elements are arranged vertically is suitable.

 The laser can be appropriately selected according to the purpose without any particular restriction. For example, the laser light used may be argon ion laser light, helium neon laser light, helium cadmium laser light, or the like. Gas laser light; Solid laser light such as YAG laser light; Semiconductor laser light; Dye laser light; Direct laser light such as excimer laser light is used.

 The heating temperature can be appropriately selected according to the purpose for which there is no particular limitation.

[0132] In the second embodiment, the image recording method of the present invention includes a latent image recording step and a heat development step, and further includes other steps as necessary.

The latent image recording step includes at least an image on the support for image recording material of the present invention. This is a step of forming a latent image by printing exposure of a thermal transfer material having a recording layer (for example, a light and heat sensitive recording layer or a heat development photosensitive layer).

 In the heat development step, the heat-developable material subjected to printing exposure is heated by a heating method using any one of a heating roller, a heating belt, a plate heater, a thermal head, a laser, and a combination thereof, thereby forming a visible image. It is a process of forming.

 The heating can be appropriately selected according to the purpose for which there is no particular limitation, and is usually 80 to 250. The power to do in C

[0133] In the third embodiment, the image recording method of the present invention includes a toner image forming step and a heat fixing step, and further includes other steps as necessary.

 The toner image forming step is a step of forming a toner image on an electrophotographic material having at least a toner image receiving layer on the image recording material support of the present invention.

 The toner image forming step can be appropriately selected depending on the purpose without particular limitation as long as it can form a toner image on an electrophotographic material, and is used, for example, in a normal electrophotographic method. For example, a direct transfer method in which a toner image formed on a developing roller is transferred to an electrophotographic material, or an intermediate transfer belt method in which a toner image is transferred to an electrophotographic material after primary transfer to an intermediate transfer belt or the like. . Among these, the intermediate transfer belt method can be suitably used from the viewpoint of environmental stability and high image quality.

 The heat fixing step is a step of fixing the toner image formed by the toner image forming step by heating using a fixing roller, a fixing belt, and a combination thereof.

 The heating can be appropriately selected according to the purpose without particular limitation, and is usually 80 to

It is preferable to do it at 200 ° C! /.

In the fourth embodiment, the image recording method of the present invention includes a toner image forming step and an image surface smoothness / fixing step, and further includes other steps as necessary.

The toner image forming step is the same as the toner image forming step in the third embodiment.

The image surface smoothing and fixing step includes a toner formed by the toner image forming step. This is a step of smoothing the surface of one image. In the image surface smoothing and fixing step, the toner image is heated and pressed using an image surface smoothing and fixing processor having a heating and pressing member, a belt member, and a cooling device, and then cooled and peeled off.

 The image surface smoothing and fixing processor includes a heating and pressing member, a belt member, and a cooling device, and includes a cooling and peeling unit and, if necessary, other members.

 [0136] The heating and pressing member can be appropriately selected depending on the purpose without any particular limitation, and examples thereof include a pair of heating rollers, a combination of a heating roller and a pressing roller, and the like. .

 The cooling device can be appropriately selected according to the purpose for which there is no particular restriction. For example, a cooling device, a heat sink, or the like that can blow cool air and adjust a cooling temperature or the like can be used.

 The cooling peeling portion can be appropriately selected according to the purpose without any particular restriction, and examples thereof include a position in the vicinity of the tension roll where the electrophotographic material itself peels off from the belt due to the rigidity (strength of waist).

[0137] When the toner image is brought into contact with the heating and pressing member of the image surface smoothing fixing processor, it is preferable to apply pressure. The method of pressurization can be appropriately selected according to the purpose for which there is no particular limitation, but it is preferable to employ a two-ply pressure. As the nips pressure, water resistance, excellent surface smoothness, viewpoint et performing image formation with a good gloss, 1~: L00kgf / cm ² is preferably tool 5~30kgf / cm ² and more preferably . The heating in the heating and pressing member is at a temperature higher than the soft point of the toner image-receiving layer polymer, and a different force depending on the toner image-receiving layer polymer used. Usually, 80 to 200 ° C. is preferable. The cooling temperature in the cooling device is more preferably 20 to 80 ° C., preferably 80 ° C. or less, at which the toner image-receiving layer is sufficiently solidified.

 [0138] The belt member includes a heat-resistant support film and a release layer formed on the support film.

The material of the support film can be appropriately selected according to the purpose without particular limitation as long as it has heat resistance. For example, polyimide (PI), polyethylene naphthalate (PEN), polyethylene terephthalate (PET) , Polyetheretherketone (PEEK), Examples include polyethersulfone (PES), polyetherimide (PEI), polyparabanic acid (PPA), and the like.

 [0139] The release layer preferably contains at least one selected from silicone rubber, fluorine rubber, fluorocarbon siloxane rubber, silicone resin and fluorine resin. Among these, a mode in which a fluorocarbon siloxane rubber-containing layer is provided on the surface of the belt member, a silicone rubber-containing layer is provided on the surface of the belt member, and a fluorocarbon is provided on the surface of the silicone rubber-containing layer. An embodiment in which a carbon siloxane rubber-containing layer is provided is preferable.

 [0140] The fluorocarbon siloxane rubber preferably has at least one of a perfluoroalkyl ether group and a perfluoroalkyl group in the main chain. As the fluorocarbon siloxane rubber, a cured product of a fluorocarbon siloxane rubber composition containing the following components (A) to (D) is preferable.

 (A) A fluorocarbon polymer having a fluorocarbon siloxane represented by the following general formula (1) as a main component and having an aliphatic unsaturated group, (B) containing two or more ≡SiH groups in one molecule. , At least one of organopolysiloxane and fluorocarbon siloxane in which the content of the ≡Si H group is 1 to 4 times the molar amount with respect to the amount of aliphatic unsaturated groups in the fluorocarbon siloxane rubber composition, (C) a filler, and (D) an effective amount of catalyst.

 [0141] The fluorocarbon polymer of the component (A) is mainly composed of a fluorocarbon siloxane having a repeating unit represented by the following general formula (1) and has an aliphatic unsaturated group.

 [0142] [Chemical 1]

 —General formula (1)

[0143] In the general formula (1), ^R1C> represents an unsubstituted or substituted monovalent hydrocarbon having 1 to 8 carbon atoms. A methyl group is particularly preferred, which is preferably an alkyl group having 1 to 8 carbon atoms or an alkyl group having 2 to 3 carbon atoms.

 a and e each represents an integer of 0 or 1. b and d each represent an integer of 1 to 4. c represents an integer of 0 to 8. X is preferably 1 or more, more preferably 10-30.

 [0144] Examples of the component (A) include those represented by the following general formula (2).

 [Chemical 2]

CH ₂ = CH

 CH3

 —General formula (2)

[0145] In the component (B), the organopolysiloxane having an ≡SiH group includes an organohydrogenpolysiloxane having at least two hydrogen atoms bonded to a silicon atom in the molecule. it can.

 [0146] In addition, in the fluorocarbon siloxane rubber composition, when the fluorocarbon polymer of the component (A) has an aliphatic unsaturated group, It is preferable to use the above-mentioned organohydropolyene polysiloxane. That is, a cured product is formed by an addition reaction that occurs between an aliphatic unsaturated group in the fluorocarbon siloxane and a hydrogen atom bonded to a silicon atom in the organohydrogenpolysiloxane.

 [0147] As the organohydrogenpolysiloxane, various organohydrogenpolysiloxanes used in addition-curable silicone rubber compositions can be used.

[0148] In general, the organohydrodiene polysiloxane has a number power of ≡SiH groups. For one aliphatic unsaturated hydrocarbon group in the fluorocarbon siloxane of the component (A), At least one is preferable, and it is particularly preferable that the ratio is 1 to 5.

[0149] Further, the fluorocarbon having a ≡SiH group may be a unit of the above general formula (1), or, in the above general formula (1), R ^1G is a dialkylhydrogensiloxy group, and a terminal is a dialkylnodoxy. Those having a ≡SiH group such as a gensiloxy group or a silyl group are preferred, and examples thereof include those represented by the following general formula (3).

[0150] [Chemical 3]

H —

General formula (3)

 [0151] As the filler of the component (C), various fillers used in general silicone rubber compositions can be used. Examples of the filler include fumed silica, precipitated silica, carbon powder, titanium dioxide, aluminum oxide, quartz powder, talc, sericite, bentonite and the like, asbestos, glass fiber, organic Examples thereof include fibrous fillers such as fibers.

 [0152] The catalyst of the component (D) is known as an addition reaction catalyst! / Silver chloroplatinic acid, alcohol-modified chloroplatinic acid, salt 匕 platinic acid-olefin complex, platinum black or Paradium supported on a support such as alumina, silica, carbon, rhodium and olefin fin complex, chlorotris (triphenylphosphine) rhodium (Wilkinson catalyst), rhodium (I II) acetylacetonate, etc. Examples include Group VIII elements or compounds thereof in the periodic table. These complexes are preferably used by dissolving in a solvent such as an alcohol compound, an ether compound or a hydrocarbon compound.

[0153] The fluorocarbon siloxane rubber yarn composition can be appropriately selected depending on the purpose without any particular limitation, and various compounding agents can be added. For example, diphenylsilane diol, low-polymerization degree molecular chain terminal hydroxyl-blocked dimethylpolysiloxane, dispersant such as hexamethyldisilazane, heat resistance such as ferrous oxide, ferric oxide, cerium oxide, iron octylate, etc. A property improver, a colorant such as a pigment, and the like can be blended as necessary. [0154] The belt member can be obtained by coating the surface of the heat-resistant support film with the fluorocarbon siloxane rubber composition and curing by heating. If necessary, m-xylene hexafluoride can be used. It can be diluted with a solvent such as benzotrifluoride to give a coating solution, which can be applied by a general coating method such as spray coating, dip coating or knife coating. The temperature and time for heat curing can be selected as appropriate, and are selected according to the type of the support film, the production method, etc. within the temperature range of 100 to 500 ° C. and 5 seconds to 5 hours.

[0155] The thickness of the release layer formed on the surface of the heat-resistant support film is not particularly limited. In order to obtain good fixability of an image by preventing toner releasability or toner component offset, 1 ~ 200 111 months preferred, 5 ~ 150 111 months preferred 1 ヽ₀

 Here, an example of the image surface smoothing and fixing processor in the image forming apparatus of the present invention will be specifically described with reference to FIG.

 First, the toner 12 is transferred to the electrophotographic material 1 by an image forming apparatus (not shown). The electrophotographic material 1 to which the toner 1 2 has adhered is conveyed to point A by a conveyance facility (not shown), passes between the heating roller 14 and the pressure roller 15, and the toner image-receiving layer or toner 12 of the electrophotographic material 1. Is heated and pressurized at a temperature (fixing temperature) and pressure that sufficiently softens.

Here, the fixing temperature means the temperature of the surface of the toner image-receiving layer measured at the position of the heating roller 14, the pressure roller 15, and the top portion at point A, for example, 80 to 190 ° C. It is preferable that the force is 100 to 170 ° C. The pressure means the pressure on the surface of the toner image-receiving layer measured at the heating roller 14, the pressure roller 15, and the top part. For example, 1 to: LOkgfZcm ² is preferable ² to 7 kgfZcm ² is more preferable ! / ヽ.

The release agent (not shown) which is heated and pressurized in this manner and then discretely exists in the toner image receiving layer while the electrophotographic material 1 is conveyed to the cooling device 16 by the fixing belt 13. ) Is sufficiently heated and melted, and moves to the surface of the toner image-receiving layer. The released release agent forms a release agent layer (film) on the surface of the toner image-receiving layer. Thereafter, the electrophotographic material 1 is conveyed to the cooling device 16 by the fixing belt 13 and is, for example, below the soft transition point of the binder resin used in the polymer or toner of the toner image receiving layer, or the glass transition. Cooled to a temperature below the point + 10 ° C, preferably 20-80 ° C, more preferably room temperature (25 ° C). to this Thus, the release agent layer (film) formed on the surface of the toner image-receiving layer is cooled and solidified to form a release agent layer.

 The cooled electrophotographic material 1 is further conveyed to point B by the fixing belt 13, and the fixing belt 13 moves on the tension roller 17. Therefore, the electrophotographic material 1 and the fixing belt 13 are peeled off at the point B. In addition, it is preferable to set the diameter of the tension roll small so that the electrophotographic material peels off from the belt with its own rigidity (stretch strength).

[0158] The image surface smoothness fixing processor as shown in Fig. 3 is, for example, the electrophotographic apparatus shown in Fig. 2 (for example, a full color laser printer (DC C-500) manufactured by Fuji Xerox Co., Ltd.). ) Can be modified and used as a fixing portion.

 In FIG. 2, 200 is an image forming apparatus, 37 is a photosensitive drum, 19 is a developing device, 31 is an intermediate transfer belt, 18 is an electrophotographic material, and 25 is a fixing unit (image surface smoothing and fixing processing machine). Shown respectively.

 FIG. 3 shows a fixing unit (image surface smoothing fixing processor) 25 disposed in the image forming apparatus 200 of FIG.

 As shown in FIG. 3, the image surface smooth wrinkle fixing processor 25 includes a heating roll 71, a peeling roll 74 including the calorific heating roll 71, and an endless belt 73 rotatably supported by a tension roll 75. And a pressure roll 72 that presses the heating roll 71 through an endless belt 73.

 Further, on the inner surface side of the endless belt 73, a cooling heat sink 77 for forcibly cooling the endless belt 73 is arranged between the heating roll 71 and the peeling roll 74, and this cooling heat sink 77 constitutes a cooling sheet conveying section for cooling the electrophotographic material and conveying the sheet.

Then, as shown in FIG. 3, the image surface smoothing and fixing processor 25 transfers the color toner image onto the surface, and the electrophotographic transfer sheet on which the toner image is fixed comprises a heating roll 71 and the heating roll 71. A color toner image is introduced into a pressure contact portion (ep portion) with a pressure roll 72 that is in pressure contact with the endless belt 73 so that the color toner image is positioned on the heating roll 71 side. The color toner image is heated and melted and fixed on the electrophotographic material while passing through the pressure contact portion. [0160] Thereafter, in the pressure contact portion between the heating roll 71 and the pressure roll 72, for example, the toner is heated to a temperature of about 120 to 130 ° C and melted, and a color toner image is formed on the toner image-receiving layer. The electrophotographic material fixed on the toner is conveyed together with the endless belt 73 in a state where the toner image receiving layer on the surface is in close contact with the surface of the endless belt 73. Meanwhile, the endless belt 73 is forcibly cooled by a heat sink 77 for cooling, and after the color toner image and the toner image-receiving layer are cooled and solidified, the peeling roller 74 causes the electrophotographic material itself to be elastic (rigid). It is peeled off.

 [0161] The surface of the endless belt 73 after the peeling step is finished is such that residual toner and the like are removed by a cleaner (not shown) so that it is ready for the next image surface smoothing and fixing processing step. Yes.

 [0162] According to the image recording method of the present invention, by using the electrophotographic material having the support for an image recording material of the present invention, high recording without occurrence of blistering or fixing unevenness is achieved. A quality image can be formed.

 [0163] According to the present invention, a support for an image recording material that can solve the conventional problems and can record a high-quality image without occurrence of recording unevenness and fixing unevenness without occurrence of blisters, and the image recording material support. Can be used to provide an image recording material capable of recording high-quality images.

 Hereinafter, the power to explain the examples of the present invention The present invention is not limited to these examples.

[0165] (Example 1)

 Production of support for image recording material

 Hardwood bleached kraft pulp (LBKP) was beaten to 340ml (Canadian standard freeness, C. S. F.) with a co-refiner to produce pulp with an average fiber length of 0.63mm.

 To 100 parts by mass of this pulp, 3 parts by mass of water-swellable carboxymethylcellulose sodium (etherity 0.25, average particle size 20 m) was added and mixed and dispersed.

Then, based on the Norupu weight, cationic starch 1.0 wt%, § Le Circe Ten dimer as sizing agent (AKD) O. 5 mass _^0/0, § - on polyacrylamide 0.2 mass _^0/0, and polyamide was added so that the proportion of polyamine E Pi chlorohydrin 0.3 mass _^0/0. Na The alkyl part of the alkyl ketene dimer is derived from a fatty acid mainly composed of behenic acid.

[0166] A base paper having a basis weight of 160 gZm ² was made from the obtained pulp paper stock using a long paper machine.

In the middle of the drying zone of the long paper machine, carboxy-modified polybulal alcohol 1.0.7 gZm ² was applied to the front side of the base paper (image recording).

 Side surface).

At the end of the long net paper machine, a soft calendering process was performed (the image recording surface side (front surface) was a metal roll surface temperature of 120 ° C, and the back surface was a resin roll surface temperature of 50 ° C). The density was adjusted to 0.98 gZcm ³ .

 [0167] Next, the image recording surface side (front surface) of the base paper is subjected to corona discharge treatment, and the first polymer coating layer (lower layer) contains 15% by mass of titanium dioxide and low density polyethylene resin. (LDPE) Z High-density polyethylene resin (HDPE) = 2/8 (mass ratio) of polyethylene composition to a thickness of 10 / zm and a second polymer coating layer (upper layer) 15 Two layers of melt-coextruded LDPE containing 20% by mass of titanium dioxide with a co-extruder were coated to a thickness of 20 m.

 On the other hand, the back surface of the base paper was subjected to corona discharge treatment, and a back surface polyolefin resin layer was formed by melt extrusion coating of LDPE containing 15% by mass of titanium dioxide to a thickness of 30 m.

Then, by coating a subbing layer consisting of gelatin on the front surface of polyethylene榭脂layer Do so that a 0. lgZm ^2. Thus, the support for image recording material of Example 1 was produced.

(Examples 2 to 5 and Comparative Examples 1 to 5)

 Production of support for image recording material

 In Example 1, as shown in Table 2, Examples 2 to 5 and Example 2 were performed in the same manner as Example 1 except that the first polymer coating layer (lower layer) and the second polymer coating layer (upper layer) were changed. Supports for image recording materials of Comparative Examples 1 to 5 were produced.

 Comparative Example 1 and Comparative Example 2 are polymer coating layers having a single layer structure without the second polymer coating layer (upper layer).

[0169] [Table 2] 1st layer (lower layer) 2nd layer (upper layer)

LDPE HDPE average density thickness LDPE HDPE average density thickness

(Mass%) (mass%) (g / cm (// m) (mass%) (mass%) (g / cm> (m) Example 1 20% 80% 0.959 1 0 100% 0% 0.924 20 Implementation Example 2 20% 80% 0.959 1 5 100% 0% 0.924 15 Example 3 20% 80% 0.959 20 100% 0% 0.924 10 Example 4 70% 30% 0.937 1 0 100% 0% 0.924 20 Example 5 70 % 30% 0.937 1 5 100% 0% 0.924 15 Example 6 70% 30% 0.937 20 100% 0% 0.924 10 Example 7 90% 1 0% 0.928 1 5 100% 0% 0.924 15 Example 8 90% 1 0% 0.928 20 100% 0% 0.924 20 Comparative Example 1 1 00% 0% 0.924 30 None

 Comparative Example 2 1 00% 0% 0.924 1 5 20% 80% 0.959 15 Comparative Example 3 70% 30% 0.937 30 None

 Comparative Example 4 20% 80% 0.959 30 None

* LDPE: Low density polyethylene resin, MFR = 3.5gZlO, density = 0.924g / cm

* HDPE: High density polyethylene resin, MFR = 15 gZlO content, Density = 0.968 g / cm ³ [0170] (Examples 9-16 and Comparative Examples 5-8)

 Production of image paper for electrophotography

 Using the image recording material supports of Examples 1 to 8 and Comparative Examples 1 to 4, electrophotographic image receiving papers of Examples 9 to 16 and Comparative Examples 5 to 8 were produced by the following method.

[0171] Titanium monoxide dispersion

 Titanium dioxide (Typeter (registered trademark) A-220, manufactured by Ishihara Sangyo Co., Ltd.) 40.0 g, Polyalcohol (PVA102, manufactured by Kuraray Co., Ltd.) 2.0 g, and ion-exchanged water 58. Og Then, it was dispersed with NBK-2 manufactured by Nippon Seiki Seisakusho to prepare a titanium dioxide dispersion (content of titanium dioxide with a titanium dioxide content of 40% by mass).

[0172] Preparation of coating solution for toner image-receiving layer

15.5 g of the above titanium dioxide dispersion, 15.0 g of carnauba wax dispersion (Cerosol 524, manufactured by Chukyo Yushi Co., Ltd.), water dispersion of polyester rosin (solid content 30% by mass, KZA-7049, Utica Corporation 10.0g, thickener (Alcox E30, manufactured by Meisei Chemical Co., Ltd.) 2.0 g, AE surfactant (AOT) O. 5 g, and ion-exchange water 80 ml were mixed and stirred to prepare a toner image-receiving layer coating solution.

 The resulting toner image-receiving layer coating solution had a viscosity of 40 mPa's and a surface tension of 34 mNZm.

[0173] Preparation of coating solution for back layer

 Acrylic rosin water dispersion (solid content 30% by mass, Hi-loss XBH-997L, manufactured by Seiko Chemical Industry Co., Ltd.) 10.0 g, matting agent (Tecpomer MBX-12, manufactured by Sekisui Plastics Co., Ltd.) 5.0 g, release Mold (Hydrin D337, manufactured by Chukyo Yushi Co., Ltd.) 10.0 g, Thickener (CMC) 2.0 g, Charon surfactant (AOT) 0.5 g, and ion-exchanged water 80 ml were mixed and stirred. Thus, a coating solution for the back layer was prepared.

 The resulting back layer coating solution had a viscosity of 35 mPa's and a surface tension of 33 mN / m 2.

 [0174] Coating of Back Layer and Toner Image Receiving Layer

The back layer coating liquid is dried with a bar coater on the surface (back surface) of the support for image recording material of each of Examples 1 to 5 and Comparative Examples 1 to 4 where the toner image receiving layer is not provided. The coating was applied so that the amount was 9 gZm ² to form a knock layer.

Further, the toner image-receiving layer coating solution was applied to the front surface of each base paper with a bar coater so that the dry mass was 12 gZm ² , thereby forming a toner image-receiving layer. The pigment content in the toner image-receiving layer was 5% by mass relative to the thermoplastic resin.

[0175] The back layer and the toner image-receiving layer were coated and dried online with hot air. In the drying, the drying air volume and temperature were adjusted so that both the back layer and the toner image-receiving layer were dried within 2 minutes after coating. The drying point was the point at which the coating surface temperature was the same as the wet bulb temperature of the drying air.

Next, after drying, a calendar process was performed. The calendering process was performed using a daros calender and a metal roller kept at 40 ° C. under a condition of a negative pressure of 14.7 kN / cm ² (15 kgf / cm ² ).

[0176] Image formation>

Each electrophotographic image-receiving paper obtained is cut into A4 size and used as an image forming device. The fixing part of the full-color laser printer (Fuji Xerox Co., Ltd., DCC-500) shown in the figure was modified to the image surface smoothing fixing processor shown in Fig. 3, image formation was performed, and fixing smoothing processing was performed under the conditions below. Went.

[0177] Ibenoreto

 Belt support: Polyimide (PI) film, width = 50 cm, thickness = 80 μm

 Belt release layer material: SIFEL610 (manufactured by Shin-Etsu Chemical Co., Ltd.), a fluorocarbonsiloxane rubber precursor, was vulcanized and cured to form a fluorocarbonsiloxane rubber having a thickness of 50 μm.

 Heating and pressing process

 Temperature of heating roller: can be arbitrarily adjusted as appropriate.

 -Pop pressure: 130NZcm "

 Cooling process

 Cooler: Heat sink length = 80mm

 Transport speed: 53mmZsec

[0178] For each of the obtained electrophotographic prints, the image quality, the occurrence of defects due to poor followability, and the prestar were evaluated as follows. The results are shown in Table 3.

[0179] <Image quality>

 The image quality of each electrophotographic print was visually observed and evaluated based on the following criteria. 〔Evaluation criteria〕

 ◎ · · · Very good (effective as a high-quality recording material).

 ○ ···· Excellent (effective as a high-quality recording material)

 Δ: Intermediate (acceptable as a high-quality recording material).

 X · · · Inferior (not possible as a high-quality recording material).

[0180] <Evaluation of occurrence of defects (edge voids) due to poor tracking>

 For each electrophotographic print, the degree of occurrence of defects (edge voids) generated at the boundary line between the toner image area and the non-image area due to poor tracking at a fixing temperature of 125 ° C. was visually observed and evaluated according to the following criteria.

〔Evaluation criteria〕 ◎: A defect (edge void) has occurred!

 ○: Defects (edge voids) are generating forces. Δ: Defects (edge voids) have occurred and are somewhat conspicuous.

 X: Many defects (edge voids) occur and are very conspicuous.

[0181] <Blister evaluation>

 For each electrophotographic image-receiving paper, the temperature of the fixing belt at which the prestar was generated by image formation was measured and evaluated according to the following criteria.

 〔Evaluation criteria〕

 A: There is no generation of blisters, and it is very excellent!

 ◯: Excellent with no blistering.

 Δ: Some blisters are generated!

 X: Many blisters occur.

[0182] [Table 3]

Industrial applicability The support for image recording material of the present invention is capable of recording high-quality images without occurrence of recording unevenness and fixing unevenness without occurrence of blisters, and can be used for various image recording materials. It can be suitably used for electrophotographic materials, heat-sensitive materials, sublimation transfer materials, thermal transfer materials, heat development materials, silver salt photographic materials, ink jet recording materials, and the like. Since the image recording material of the present invention is obtained by using the support for image recording material of the present invention, an electrophotographic material, a heat sensitive material, a sublimation transfer material, a thermal transfer material, a heat developing material, a silver salt photographic material, an ink jet It can be suitably used as a recording material.

Claims

The scope of the claims

 [1] A base paper and at least one polyolefin resin layer on both sides of the base paper. The average density force of the outermost front surface polyolefin resin layer that is not less than the above layer and has the above-mentioned base paper strength The front surface polyolefin resin other than the outermost surface polyolefin resin layer A support for an image recording material, wherein the density is lower than the average density of at least one of the layers.

 [2] The support for an image recording material according to claim 1, used for image recording in which at least one of recording by heating, development by heating, and fixing by heating is performed.

[3] The average density of the outermost surface polyolefin resin layer is less than 0.930 gZcm ³ , and at least the outer surface polyolefin resin layer other than the outermost surface polyolefin resin layer is at least ^{3. The} support for an image recording material according to any one of claims 1 to 2, wherein the average density is any one of 0.930 gZcm ³ or more.

 [4] The thickness of at least one of the front surface polyolefin resin layers other than the outermost surface polyolefin resin layer is 15 μm or more. A support for an image recording material described in Crab.

[5] The outermost surface polyolefin resin layer contains a low density polyethylene having a density of 0.930 gZcm ³ or less, and the outer surface polyolefin resin layer other than the outermost surface polyolefin resin layer. 5. The support for an image recording material according to claim 1, wherein at least one of the resin layers contains a high density polyethylene resin having a density of 0.945 gZcm ³ or more.

[6] At least the front surface polyolefin resin layer other than the outermost surface polyolefin resin layer is at least! The density of high density polyethylene resin of 0.945gZcm ³ or higher 6. The support for image recording material according to claim 5, wherein the support is for mass% or more.

 [7] The image recording material support according to any one of [1], [6], [6], wherein at least one of the polyolefin resin layers contains either an organic pigment or an inorganic pigment.

[8] The image recording material support according to any one of claims 1 to 7, and the support An image recording material comprising at least an image recording layer on a holder.

 9. The image recording material according to claim 8, wherein at least one of recording by heating, development by heating, and fixing by heating is performed.

[10] The electrophotographic material, heat-sensitive material, sublimation transfer material, thermal transfer material, heat development material, silver salt photographic material, and ink jet recording material are selected from claims 8 to 9. The image recording material described in any of the above.

[11] Claims Item 1 Power A thermal recording material having at least a thermal recording layer on the image recording material support according to any one of items 7 is used. An image recording method comprising an image recording step of recording an image by heating used.

 [12] A latent image in which a latent image is recorded by printing a heat-developable material having at least an image recording layer on the image recording material support according to any one of claims 1 to 7. Recording process,

 A heat developing process for forming a visible image by heating using a misalignment of a heat roller, a heat belt, a plate heater, a thermal head, a laser, and a combination of the heat developed material exposed to printing An image recording method.

[13] A toner image forming step of forming a toner image on an electrophotographic material having at least a toner image receiving layer on the image recording material support according to any one of claims 1 to 7; ,

 And a heat fixing step of fixing the toner image by heating using any one of a fixing roller, a fixing belt, and a combination thereof.

[14] A toner image forming step of forming a toner image on an electrophotographic material having at least a toner image-receiving layer on the image recording material support according to any one of claims 1 to 7, ,

 An image surface smoothing and fixing step of smoothing the surface of the toner image.

[15] In the image surface smoothing and fixing step, the toner image is heated and pressed using an image surface smoothing and fixing processor having a heating and pressing member, a belt member, and a cooling device, and then cooled and peeled off. The image recording method according to claim 14.

16. The image recording method according to claim 15, further comprising a layer containing a fluorocarbon siloxane rubber on the surface of the belt member.

17. The image recording according to claim 15, further comprising a layer containing a silicone rubber on the surface of the belt member, and a layer containing a fluorocarbon siloxane rubber on the surface of the silicone rubber-containing layer. Method.

[18] The claim 16 claim, wherein the fluorocarbon siloxane rubber has at least one of a perfluoroalkyl ether group and a perfluoroalkyl group in the main chain. Image recording method.